/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:43:28,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:43:28,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:43:28,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:43:28,756 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 16:43:28,779 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:43:28,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:43:28,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:43:28,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:43:28,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:43:28,780 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:43:28,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:43:28,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:43:28,780 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:43:28,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:43:28,781 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:43:28,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:43:28,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:43:28,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:43:28,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:43:28,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:43:28,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:43:28,781 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:43:28,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:43:28,781 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:43:28,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:43:28,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:43:28,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:43:28,782 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:43:28,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:43:28,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:43:28,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:43:28,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:43:28,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:43:28,782 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:43:28,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:43:28,782 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:43:28,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:43:28,783 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:43:28,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:43:28,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:43:28,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:43:28,951 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:43:28,952 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:43:28,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl [2022-03-15 16:43:28,953 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl' [2022-03-15 16:43:28,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:43:28,970 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:43:28,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:43:28,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:43:28,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:43:28,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:43:28" (1/1) ... [2022-03-15 16:43:28,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:43:28" (1/1) ... [2022-03-15 16:43:28,986 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:43:28,987 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:43:28,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:43:28,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:43:28,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:43:28,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:43:28" (1/1) ... [2022-03-15 16:43:28,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:43:28" (1/1) ... [2022-03-15 16:43:28,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:43:28" (1/1) ... [2022-03-15 16:43:28,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:43:28" (1/1) ... [2022-03-15 16:43:28,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:43:28" (1/1) ... [2022-03-15 16:43:28,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:43:28" (1/1) ... [2022-03-15 16:43:28,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:43:28" (1/1) ... [2022-03-15 16:43:29,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:43:29,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:43:29,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:43:29,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:43:29,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:43:28" (1/1) ... [2022-03-15 16:43:29,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:43:29,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:29,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 16:43:29,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 16:43:29,063 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:43:29,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:43:29,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:43:29,063 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:43:29,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:43:29,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:43:29,063 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:43:29,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:43:29,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:43:29,064 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 16:43:29,105 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:43:29,108 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:43:29,208 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:43:29,221 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:43:29,221 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:43:29,222 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:43:29 BoogieIcfgContainer [2022-03-15 16:43:29,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:43:29,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:43:29,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:43:29,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:43:29,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:43:28" (1/2) ... [2022-03-15 16:43:29,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dab1a06 and model type inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:43:29, skipping insertion in model container [2022-03-15 16:43:29,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:43:29" (2/2) ... [2022-03-15 16:43:29,231 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq-array.wvr.bpl [2022-03-15 16:43:29,234 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:43:29,234 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:43:29,234 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:43:29,235 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:43:29,273 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 16:43:29,308 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:43:29,315 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 16:43:29,316 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 16:43:29,324 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2022-03-15 16:43:29,344 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:29,345 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:29,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 16:43:29,351 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:29,351 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:29,352 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:29,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:29,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1415635565, now seen corresponding path program 1 times [2022-03-15 16:43:29,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:29,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239333307] [2022-03-15 16:43:29,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:29,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:29,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:29,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:29,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239333307] [2022-03-15 16:43:29,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239333307] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:43:29,477 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:43:29,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:43:29,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490780635] [2022-03-15 16:43:29,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:43:29,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:43:29,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:29,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:43:29,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:43:29,499 INFO L87 Difference]: Start difference. First operand has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:29,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:29,547 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2022-03-15 16:43:29,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:43:29,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 16:43:29,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:29,555 INFO L225 Difference]: With dead ends: 104 [2022-03-15 16:43:29,555 INFO L226 Difference]: Without dead ends: 87 [2022-03-15 16:43:29,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:43:29,559 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:29,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:43:29,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-15 16:43:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2022-03-15 16:43:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2022-03-15 16:43:29,656 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2022-03-15 16:43:29,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:29,656 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2022-03-15 16:43:29,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2022-03-15 16:43:29,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:43:29,657 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:29,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:29,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:43:29,657 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:29,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:29,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1368071626, now seen corresponding path program 1 times [2022-03-15 16:43:29,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:29,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134531364] [2022-03-15 16:43:29,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:29,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:29,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:29,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134531364] [2022-03-15 16:43:29,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134531364] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:43:29,710 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:43:29,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:43:29,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120486898] [2022-03-15 16:43:29,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:43:29,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:43:29,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:29,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:43:29,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:43:29,712 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:29,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:29,737 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2022-03-15 16:43:29,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:43:29,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:43:29,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:29,738 INFO L225 Difference]: With dead ends: 91 [2022-03-15 16:43:29,738 INFO L226 Difference]: Without dead ends: 83 [2022-03-15 16:43:29,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:43:29,740 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:29,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 31 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:43:29,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-15 16:43:29,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-15 16:43:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:29,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2022-03-15 16:43:29,746 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2022-03-15 16:43:29,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:29,746 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2022-03-15 16:43:29,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:29,746 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2022-03-15 16:43:29,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:43:29,747 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:29,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:29,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 16:43:29,748 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:29,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:29,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1835440604, now seen corresponding path program 1 times [2022-03-15 16:43:29,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:29,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563822376] [2022-03-15 16:43:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:29,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:29,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:29,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563822376] [2022-03-15 16:43:29,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563822376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:29,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071769811] [2022-03-15 16:43:29,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:29,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:29,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:29,863 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:29,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 16:43:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:29,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:43:29,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:29,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-15 16:43:30,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 16:43:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:30,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:30,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:30,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-03-15 16:43:30,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:43:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:30,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071769811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:30,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:30,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-03-15 16:43:30,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621952411] [2022-03-15 16:43:30,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:30,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 16:43:30,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:30,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 16:43:30,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:43:30,247 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:30,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:30,361 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2022-03-15 16:43:30,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:43:30,361 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:43:30,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:30,365 INFO L225 Difference]: With dead ends: 154 [2022-03-15 16:43:30,365 INFO L226 Difference]: Without dead ends: 137 [2022-03-15 16:43:30,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:43:30,369 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:30,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 79 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:43:30,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-15 16:43:30,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2022-03-15 16:43:30,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:30,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2022-03-15 16:43:30,403 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2022-03-15 16:43:30,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:30,403 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2022-03-15 16:43:30,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:30,403 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2022-03-15 16:43:30,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:43:30,404 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:30,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:30,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:30,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:30,620 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:30,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:30,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2029618617, now seen corresponding path program 2 times [2022-03-15 16:43:30,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:30,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953704827] [2022-03-15 16:43:30,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:30,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:30,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:30,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953704827] [2022-03-15 16:43:30,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953704827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:30,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368419465] [2022-03-15 16:43:30,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:43:30,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:30,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:30,699 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:30,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 16:43:30,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:43:30,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:30,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 16:43:30,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:30,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:30,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368419465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:30,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:30,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-03-15 16:43:30,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459113911] [2022-03-15 16:43:30,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:30,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 16:43:30,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:30,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 16:43:30,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:43:30,830 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:30,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:30,898 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2022-03-15 16:43:30,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:43:30,899 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:43:30,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:30,900 INFO L225 Difference]: With dead ends: 284 [2022-03-15 16:43:30,900 INFO L226 Difference]: Without dead ends: 264 [2022-03-15 16:43:30,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:43:30,901 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:30,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 59 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:43:30,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-15 16:43:30,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2022-03-15 16:43:30,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:30,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2022-03-15 16:43:30,912 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2022-03-15 16:43:30,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:30,912 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2022-03-15 16:43:30,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:30,912 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2022-03-15 16:43:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:43:30,913 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:30,913 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:30,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:31,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-15 16:43:31,132 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:31,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:31,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1131642343, now seen corresponding path program 3 times [2022-03-15 16:43:31,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:31,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748467734] [2022-03-15 16:43:31,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:31,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:31,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:31,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748467734] [2022-03-15 16:43:31,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748467734] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:31,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066698342] [2022-03-15 16:43:31,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:43:31,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:31,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:31,388 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:31,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 16:43:31,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:43:31,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:31,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:43:31,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:31,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:31,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-03-15 16:43:31,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:31,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2022-03-15 16:43:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:32,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:32,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:32,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 45 [2022-03-15 16:43:32,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:43:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:32,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066698342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:32,853 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:32,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 34 [2022-03-15 16:43:32,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065043051] [2022-03-15 16:43:32,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:32,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:43:32,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:32,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:43:32,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:43:32,856 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:33,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:33,676 INFO L93 Difference]: Finished difference Result 536 states and 1142 transitions. [2022-03-15 16:43:33,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:43:33,677 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:43:33,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:33,679 INFO L225 Difference]: With dead ends: 536 [2022-03-15 16:43:33,679 INFO L226 Difference]: Without dead ends: 533 [2022-03-15 16:43:33,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=561, Invalid=2631, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:43:33,681 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 227 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:33,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 468 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 313 Invalid, 0 Unknown, 427 Unchecked, 0.1s Time] [2022-03-15 16:43:33,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-03-15 16:43:33,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 276. [2022-03-15 16:43:33,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.1272727272727274) internal successors, (585), 275 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:33,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 585 transitions. [2022-03-15 16:43:33,691 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 585 transitions. Word has length 32 [2022-03-15 16:43:33,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:33,692 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 585 transitions. [2022-03-15 16:43:33,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 585 transitions. [2022-03-15 16:43:33,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:43:33,693 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:33,693 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:33,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:33,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:33,913 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:33,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:33,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1215898163, now seen corresponding path program 4 times [2022-03-15 16:43:33,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:33,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942547471] [2022-03-15 16:43:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:33,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:34,131 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:34,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942547471] [2022-03-15 16:43:34,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942547471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:34,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854991466] [2022-03-15 16:43:34,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:43:34,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:34,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:34,133 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:34,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 16:43:34,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:43:34,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:34,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:43:34,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:34,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:34,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-03-15 16:43:34,511 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:43:34,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:43:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:34,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:34,730 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:43:34,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:43:34,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:43:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:34,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854991466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:34,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:34,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 25 [2022-03-15 16:43:34,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967906873] [2022-03-15 16:43:34,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:34,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:43:34,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:34,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:43:34,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:43:34,890 INFO L87 Difference]: Start difference. First operand 276 states and 585 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:35,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:35,525 INFO L93 Difference]: Finished difference Result 546 states and 1148 transitions. [2022-03-15 16:43:35,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:43:35,525 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:43:35,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:35,527 INFO L225 Difference]: With dead ends: 546 [2022-03-15 16:43:35,527 INFO L226 Difference]: Without dead ends: 529 [2022-03-15 16:43:35,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:43:35,528 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 179 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:35,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 295 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 880 Invalid, 0 Unknown, 169 Unchecked, 0.3s Time] [2022-03-15 16:43:35,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-03-15 16:43:35,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 281. [2022-03-15 16:43:35,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1285714285714286) internal successors, (596), 280 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 596 transitions. [2022-03-15 16:43:35,535 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 596 transitions. Word has length 32 [2022-03-15 16:43:35,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:35,535 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 596 transitions. [2022-03-15 16:43:35,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:35,536 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 596 transitions. [2022-03-15 16:43:35,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:43:35,537 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:35,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:35,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-15 16:43:35,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:35,753 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:35,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:35,753 INFO L85 PathProgramCache]: Analyzing trace with hash 307390119, now seen corresponding path program 5 times [2022-03-15 16:43:35,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:35,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044418641] [2022-03-15 16:43:35,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:35,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:43:35,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:35,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044418641] [2022-03-15 16:43:35,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044418641] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:35,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813184038] [2022-03-15 16:43:35,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:43:35,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:35,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:35,980 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:35,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 16:43:36,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:43:36,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:36,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:43:36,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:36,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:36,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-15 16:43:36,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:36,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:36,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:36,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:43:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:36,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:36,660 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:43:36,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-15 16:43:36,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:43:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:36,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813184038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:36,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:36,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-03-15 16:43:36,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212329039] [2022-03-15 16:43:36,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:36,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:43:36,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:36,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:43:36,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:43:36,797 INFO L87 Difference]: Start difference. First operand 281 states and 596 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:36,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:36,994 INFO L93 Difference]: Finished difference Result 554 states and 1191 transitions. [2022-03-15 16:43:36,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:43:36,995 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:43:36,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:36,997 INFO L225 Difference]: With dead ends: 554 [2022-03-15 16:43:36,997 INFO L226 Difference]: Without dead ends: 527 [2022-03-15 16:43:36,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:43:36,998 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 98 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:36,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 108 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 222 Invalid, 0 Unknown, 179 Unchecked, 0.1s Time] [2022-03-15 16:43:36,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-03-15 16:43:37,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 317. [2022-03-15 16:43:37,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.1645569620253164) internal successors, (684), 316 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:37,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 684 transitions. [2022-03-15 16:43:37,005 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 684 transitions. Word has length 32 [2022-03-15 16:43:37,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:37,005 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 684 transitions. [2022-03-15 16:43:37,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:37,005 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 684 transitions. [2022-03-15 16:43:37,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:43:37,006 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:37,006 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:37,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-15 16:43:37,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:37,225 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:37,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:37,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1473211481, now seen corresponding path program 6 times [2022-03-15 16:43:37,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:37,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480890802] [2022-03-15 16:43:37,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:37,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:43:37,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:37,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480890802] [2022-03-15 16:43:37,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480890802] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:37,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362856618] [2022-03-15 16:43:37,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:43:37,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:37,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:37,432 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:37,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 16:43:37,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:43:37,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:37,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:43:37,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:37,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:37,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-15 16:43:37,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:37,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:37,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:37,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:43:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:37,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:38,189 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:43:38,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-15 16:43:38,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:43:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:38,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362856618] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:38,320 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:38,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-03-15 16:43:38,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689258727] [2022-03-15 16:43:38,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:38,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:43:38,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:38,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:43:38,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:43:38,322 INFO L87 Difference]: Start difference. First operand 317 states and 684 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:38,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:38,538 INFO L93 Difference]: Finished difference Result 639 states and 1386 transitions. [2022-03-15 16:43:38,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:43:38,539 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:43:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:38,541 INFO L225 Difference]: With dead ends: 639 [2022-03-15 16:43:38,541 INFO L226 Difference]: Without dead ends: 607 [2022-03-15 16:43:38,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=856, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:43:38,542 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 96 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:38,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 126 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 205 Invalid, 0 Unknown, 220 Unchecked, 0.1s Time] [2022-03-15 16:43:38,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-03-15 16:43:38,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 324. [2022-03-15 16:43:38,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.1393188854489162) internal successors, (691), 323 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:38,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 691 transitions. [2022-03-15 16:43:38,550 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 691 transitions. Word has length 32 [2022-03-15 16:43:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:38,550 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 691 transitions. [2022-03-15 16:43:38,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:38,550 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 691 transitions. [2022-03-15 16:43:38,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:43:38,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:38,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:38,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:38,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:38,768 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:38,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:38,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1147796233, now seen corresponding path program 7 times [2022-03-15 16:43:38,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:38,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138608892] [2022-03-15 16:43:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:38,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:43:39,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:39,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138608892] [2022-03-15 16:43:39,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138608892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:39,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004937623] [2022-03-15 16:43:39,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:43:39,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:39,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:39,001 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:39,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 16:43:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:39,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:43:39,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:39,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:39,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:43:39,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:39,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:39,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:39,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:43:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:39,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:39,647 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:43:39,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:43:39,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:43:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:39,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004937623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:39,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:39,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-03-15 16:43:39,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735546308] [2022-03-15 16:43:39,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:39,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:43:39,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:39,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:43:39,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:43:39,787 INFO L87 Difference]: Start difference. First operand 324 states and 691 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:39,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:39,995 INFO L93 Difference]: Finished difference Result 572 states and 1216 transitions. [2022-03-15 16:43:39,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:43:39,995 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:43:39,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:39,997 INFO L225 Difference]: With dead ends: 572 [2022-03-15 16:43:39,997 INFO L226 Difference]: Without dead ends: 548 [2022-03-15 16:43:39,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:43:39,998 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:39,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 163 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 243 Invalid, 0 Unknown, 236 Unchecked, 0.1s Time] [2022-03-15 16:43:39,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-03-15 16:43:40,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 393. [2022-03-15 16:43:40,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.1581632653061225) internal successors, (846), 392 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 846 transitions. [2022-03-15 16:43:40,007 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 846 transitions. Word has length 32 [2022-03-15 16:43:40,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:40,007 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 846 transitions. [2022-03-15 16:43:40,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:40,007 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 846 transitions. [2022-03-15 16:43:40,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:43:40,008 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:40,008 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:40,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:40,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:40,222 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:40,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:40,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1369686285, now seen corresponding path program 8 times [2022-03-15 16:43:40,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:40,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045791347] [2022-03-15 16:43:40,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:40,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:43:40,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:40,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045791347] [2022-03-15 16:43:40,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045791347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:40,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011865427] [2022-03-15 16:43:40,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:43:40,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:40,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:40,457 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:40,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 16:43:40,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:43:40,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:40,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:43:40,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:40,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:40,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:43:40,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:40,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:40,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:43:40,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:40,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:41,111 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:43:41,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:43:41,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:43:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:41,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011865427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:41,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:41,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 29 [2022-03-15 16:43:41,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288053473] [2022-03-15 16:43:41,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:41,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:43:41,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:41,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:43:41,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:43:41,229 INFO L87 Difference]: Start difference. First operand 393 states and 846 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:41,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:41,660 INFO L93 Difference]: Finished difference Result 743 states and 1622 transitions. [2022-03-15 16:43:41,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:43:41,661 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:43:41,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:41,663 INFO L225 Difference]: With dead ends: 743 [2022-03-15 16:43:41,663 INFO L226 Difference]: Without dead ends: 716 [2022-03-15 16:43:41,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:43:41,664 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 99 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:41,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 182 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 453 Invalid, 0 Unknown, 326 Unchecked, 0.2s Time] [2022-03-15 16:43:41,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-03-15 16:43:41,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 426. [2022-03-15 16:43:41,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.1788235294117646) internal successors, (926), 425 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 926 transitions. [2022-03-15 16:43:41,677 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 926 transitions. Word has length 32 [2022-03-15 16:43:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:41,677 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 926 transitions. [2022-03-15 16:43:41,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:41,691 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 926 transitions. [2022-03-15 16:43:41,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:43:41,692 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:41,693 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:41,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:41,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-15 16:43:41,893 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:41,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:41,894 INFO L85 PathProgramCache]: Analyzing trace with hash -727791177, now seen corresponding path program 9 times [2022-03-15 16:43:41,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:41,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694174950] [2022-03-15 16:43:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:41,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:42,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:42,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694174950] [2022-03-15 16:43:42,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694174950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:42,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239251426] [2022-03-15 16:43:42,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:43:42,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:42,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:42,139 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:42,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:43:42,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:43:42,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:42,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:43:42,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:42,419 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:42,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-03-15 16:43:42,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:42,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:42,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 26 [2022-03-15 16:43:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:42,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:43,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:43,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:43,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:43,952 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:43,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 37 [2022-03-15 16:43:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:44,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239251426] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:44,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:44,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 37 [2022-03-15 16:43:44,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853502601] [2022-03-15 16:43:44,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:44,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:43:44,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:44,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:43:44,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:43:44,018 INFO L87 Difference]: Start difference. First operand 426 states and 926 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:46,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:46,287 INFO L93 Difference]: Finished difference Result 1367 states and 2897 transitions. [2022-03-15 16:43:46,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-15 16:43:46,287 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:43:46,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:46,291 INFO L225 Difference]: With dead ends: 1367 [2022-03-15 16:43:46,291 INFO L226 Difference]: Without dead ends: 1312 [2022-03-15 16:43:46,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2707 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1210, Invalid=6800, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 16:43:46,292 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 598 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 749 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:46,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 396 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 903 Invalid, 0 Unknown, 749 Unchecked, 0.4s Time] [2022-03-15 16:43:46,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2022-03-15 16:43:46,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 562. [2022-03-15 16:43:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 2.229946524064171) internal successors, (1251), 561 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:46,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1251 transitions. [2022-03-15 16:43:46,304 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1251 transitions. Word has length 32 [2022-03-15 16:43:46,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:46,305 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 1251 transitions. [2022-03-15 16:43:46,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:46,305 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1251 transitions. [2022-03-15 16:43:46,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:43:46,306 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:46,306 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:46,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:46,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:46,517 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:46,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:46,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1786574519, now seen corresponding path program 10 times [2022-03-15 16:43:46,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:46,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229399766] [2022-03-15 16:43:46,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:46,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:46,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:46,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229399766] [2022-03-15 16:43:46,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229399766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:46,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705665765] [2022-03-15 16:43:46,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:43:46,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:46,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:46,731 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:46,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:43:46,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:43:46,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:46,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:43:46,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:46,988 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:46,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:43:47,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:47,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:47,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:43:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:47,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:47,326 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:43:47,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:43:47,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:43:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:47,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705665765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:47,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:47,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-03-15 16:43:47,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109129602] [2022-03-15 16:43:47,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:47,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:43:47,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:47,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:43:47,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:43:47,453 INFO L87 Difference]: Start difference. First operand 562 states and 1251 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:47,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:47,681 INFO L93 Difference]: Finished difference Result 669 states and 1470 transitions. [2022-03-15 16:43:47,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:43:47,682 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:43:47,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:47,684 INFO L225 Difference]: With dead ends: 669 [2022-03-15 16:43:47,684 INFO L226 Difference]: Without dead ends: 652 [2022-03-15 16:43:47,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:43:47,684 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 95 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:47,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 111 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 181 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2022-03-15 16:43:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-03-15 16:43:47,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 584. [2022-03-15 16:43:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.2315608919382504) internal successors, (1301), 583 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1301 transitions. [2022-03-15 16:43:47,694 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1301 transitions. Word has length 32 [2022-03-15 16:43:47,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:47,694 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 1301 transitions. [2022-03-15 16:43:47,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1301 transitions. [2022-03-15 16:43:47,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:43:47,695 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:47,695 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:47,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:47,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-15 16:43:47,911 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:47,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:47,911 INFO L85 PathProgramCache]: Analyzing trace with hash 112614937, now seen corresponding path program 11 times [2022-03-15 16:43:47,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:47,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54557486] [2022-03-15 16:43:47,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:47,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:48,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:48,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54557486] [2022-03-15 16:43:48,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54557486] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:48,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749552232] [2022-03-15 16:43:48,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:43:48,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:48,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:48,154 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:48,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:43:48,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:43:48,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:48,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:43:48,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:48,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:48,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-15 16:43:48,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:48,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:48,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:43:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:48,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:48,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:48,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:48,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:48,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 57 [2022-03-15 16:43:48,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:43:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:48,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749552232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:48,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:48,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 34 [2022-03-15 16:43:48,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270631982] [2022-03-15 16:43:48,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:48,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:43:48,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:48,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:43:48,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:43:48,999 INFO L87 Difference]: Start difference. First operand 584 states and 1301 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:49,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:49,399 INFO L93 Difference]: Finished difference Result 969 states and 2149 transitions. [2022-03-15 16:43:49,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:43:49,400 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:43:49,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:49,403 INFO L225 Difference]: With dead ends: 969 [2022-03-15 16:43:49,403 INFO L226 Difference]: Without dead ends: 944 [2022-03-15 16:43:49,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:43:49,404 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 113 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:49,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 167 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 243 Invalid, 0 Unknown, 322 Unchecked, 0.1s Time] [2022-03-15 16:43:49,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-03-15 16:43:49,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 655. [2022-03-15 16:43:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.2370030581039755) internal successors, (1463), 654 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:49,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1463 transitions. [2022-03-15 16:43:49,432 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1463 transitions. Word has length 32 [2022-03-15 16:43:49,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:49,432 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1463 transitions. [2022-03-15 16:43:49,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:49,433 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1463 transitions. [2022-03-15 16:43:49,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:43:49,433 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:49,433 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:49,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:49,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 16:43:49,634 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:49,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:49,634 INFO L85 PathProgramCache]: Analyzing trace with hash -708561801, now seen corresponding path program 12 times [2022-03-15 16:43:49,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:49,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937813871] [2022-03-15 16:43:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:49,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:49,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:49,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937813871] [2022-03-15 16:43:49,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937813871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:49,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507268981] [2022-03-15 16:43:49,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:43:49,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:49,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:49,840 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:49,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:43:49,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:43:49,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:49,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:43:49,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:50,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:50,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-15 16:43:50,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:50,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:50,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:43:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:50,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:50,451 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:43:50,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-15 16:43:50,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:43:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:50,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507268981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:50,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:50,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-03-15 16:43:50,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412701868] [2022-03-15 16:43:50,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:50,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:43:50,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:50,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:43:50,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:43:50,539 INFO L87 Difference]: Start difference. First operand 655 states and 1463 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:50,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:50,714 INFO L93 Difference]: Finished difference Result 715 states and 1583 transitions. [2022-03-15 16:43:50,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:43:50,715 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:43:50,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:50,717 INFO L225 Difference]: With dead ends: 715 [2022-03-15 16:43:50,717 INFO L226 Difference]: Without dead ends: 707 [2022-03-15 16:43:50,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:43:50,718 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:50,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 146 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 209 Unchecked, 0.1s Time] [2022-03-15 16:43:50,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-03-15 16:43:50,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 682. [2022-03-15 16:43:50,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 2.2305433186490453) internal successors, (1519), 681 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1519 transitions. [2022-03-15 16:43:50,729 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1519 transitions. Word has length 32 [2022-03-15 16:43:50,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:50,729 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 1519 transitions. [2022-03-15 16:43:50,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:50,729 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1519 transitions. [2022-03-15 16:43:50,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:43:50,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:50,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:50,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:50,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-15 16:43:50,946 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:50,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:50,947 INFO L85 PathProgramCache]: Analyzing trace with hash 306961723, now seen corresponding path program 13 times [2022-03-15 16:43:50,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:50,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698794977] [2022-03-15 16:43:50,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:50,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:51,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:51,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698794977] [2022-03-15 16:43:51,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698794977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:51,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448876900] [2022-03-15 16:43:51,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:43:51,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:51,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:51,170 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:51,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:43:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:51,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:43:51,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:51,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:51,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:43:51,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:51,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:51,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:51,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:43:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:51,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:51,732 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:43:51,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:43:51,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:43:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:51,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448876900] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:51,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:51,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 30 [2022-03-15 16:43:51,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631841837] [2022-03-15 16:43:51,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:51,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:43:51,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:51,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:43:51,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:43:51,852 INFO L87 Difference]: Start difference. First operand 682 states and 1519 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:52,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:52,570 INFO L93 Difference]: Finished difference Result 1476 states and 3239 transitions. [2022-03-15 16:43:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:43:52,571 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:43:52,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:52,575 INFO L225 Difference]: With dead ends: 1476 [2022-03-15 16:43:52,575 INFO L226 Difference]: Without dead ends: 1322 [2022-03-15 16:43:52,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=397, Invalid=2053, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:43:52,576 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 252 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 467 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:52,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 349 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 530 Invalid, 0 Unknown, 467 Unchecked, 0.3s Time] [2022-03-15 16:43:52,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-03-15 16:43:52,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 843. [2022-03-15 16:43:52,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 2.2422802850356294) internal successors, (1888), 842 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1888 transitions. [2022-03-15 16:43:52,595 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1888 transitions. Word has length 32 [2022-03-15 16:43:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:52,595 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1888 transitions. [2022-03-15 16:43:52,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:52,595 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1888 transitions. [2022-03-15 16:43:52,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:43:52,597 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:52,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:52,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-15 16:43:52,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-15 16:43:52,825 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:52,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:52,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1366997859, now seen corresponding path program 14 times [2022-03-15 16:43:52,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:52,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192346958] [2022-03-15 16:43:52,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:52,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:53,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:53,039 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:53,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192346958] [2022-03-15 16:43:53,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192346958] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:53,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709800500] [2022-03-15 16:43:53,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:43:53,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:53,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:53,056 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:53,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:43:53,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:43:53,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:53,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:43:53,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:53,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:53,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:43:53,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:53,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:53,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:53,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:43:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:53,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:53,533 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:43:53,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:43:53,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:43:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:53,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709800500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:53,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:53,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 30 [2022-03-15 16:43:53,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875172542] [2022-03-15 16:43:53,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:53,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:43:53,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:53,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:43:53,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:43:53,614 INFO L87 Difference]: Start difference. First operand 843 states and 1888 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:54,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:54,177 INFO L93 Difference]: Finished difference Result 1446 states and 3193 transitions. [2022-03-15 16:43:54,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:43:54,177 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:43:54,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:54,181 INFO L225 Difference]: With dead ends: 1446 [2022-03-15 16:43:54,181 INFO L226 Difference]: Without dead ends: 1352 [2022-03-15 16:43:54,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=2307, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:43:54,182 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 159 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:54,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 247 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 409 Invalid, 0 Unknown, 303 Unchecked, 0.2s Time] [2022-03-15 16:43:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2022-03-15 16:43:54,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1008. [2022-03-15 16:43:54,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1007 states have (on average 2.266137040714995) internal successors, (2282), 1007 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:54,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 2282 transitions. [2022-03-15 16:43:54,202 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 2282 transitions. Word has length 32 [2022-03-15 16:43:54,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:54,202 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 2282 transitions. [2022-03-15 16:43:54,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:54,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 2282 transitions. [2022-03-15 16:43:54,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:43:54,203 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:54,204 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:54,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:54,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:54,420 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:54,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:54,421 INFO L85 PathProgramCache]: Analyzing trace with hash 2106792699, now seen corresponding path program 15 times [2022-03-15 16:43:54,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:54,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682740294] [2022-03-15 16:43:54,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:54,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:54,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:54,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682740294] [2022-03-15 16:43:54,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682740294] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:54,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693871321] [2022-03-15 16:43:54,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:43:54,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:54,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:54,633 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:54,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:43:54,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:43:54,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:54,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:43:54,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:54,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:54,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-15 16:43:55,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:55,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:55,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2022-03-15 16:43:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:55,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:55,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:55,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:55,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:55,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:55,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-03-15 16:43:55,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-03-15 16:43:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:55,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693871321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:55,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:55,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 38 [2022-03-15 16:43:55,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026742343] [2022-03-15 16:43:55,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:55,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 16:43:55,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:55,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 16:43:55,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1250, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:43:55,958 INFO L87 Difference]: Start difference. First operand 1008 states and 2282 transitions. Second operand has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:56,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:56,629 INFO L93 Difference]: Finished difference Result 1235 states and 2744 transitions. [2022-03-15 16:43:56,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:43:56,630 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:43:56,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:56,633 INFO L225 Difference]: With dead ends: 1235 [2022-03-15 16:43:56,633 INFO L226 Difference]: Without dead ends: 1214 [2022-03-15 16:43:56,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 16:43:56,635 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 88 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:56,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 215 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 80 Invalid, 0 Unknown, 311 Unchecked, 0.0s Time] [2022-03-15 16:43:56,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2022-03-15 16:43:56,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1080. [2022-03-15 16:43:56,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 2.2567191844300276) internal successors, (2435), 1079 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:56,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 2435 transitions. [2022-03-15 16:43:56,650 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 2435 transitions. Word has length 32 [2022-03-15 16:43:56,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:56,650 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 2435 transitions. [2022-03-15 16:43:56,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:56,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 2435 transitions. [2022-03-15 16:43:56,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:43:56,652 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:56,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:56,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:56,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-15 16:43:56,869 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:56,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:56,869 INFO L85 PathProgramCache]: Analyzing trace with hash 78448107, now seen corresponding path program 16 times [2022-03-15 16:43:56,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:56,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366326947] [2022-03-15 16:43:56,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:56,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:57,071 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:57,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366326947] [2022-03-15 16:43:57,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366326947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:57,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867103577] [2022-03-15 16:43:57,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:43:57,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:57,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:57,073 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:57,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 16:43:57,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:43:57,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:57,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:43:57,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:57,338 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:57,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:43:57,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:57,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:57,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:43:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:57,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:57,720 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:43:57,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:43:57,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:43:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:57,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867103577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:57,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:57,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-03-15 16:43:57,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937672592] [2022-03-15 16:43:57,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:57,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:43:57,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:57,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:43:57,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:43:57,896 INFO L87 Difference]: Start difference. First operand 1080 states and 2435 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:58,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:58,135 INFO L93 Difference]: Finished difference Result 1216 states and 2718 transitions. [2022-03-15 16:43:58,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:43:58,135 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:43:58,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:58,139 INFO L225 Difference]: With dead ends: 1216 [2022-03-15 16:43:58,139 INFO L226 Difference]: Without dead ends: 1204 [2022-03-15 16:43:58,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:43:58,140 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:58,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 125 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 210 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2022-03-15 16:43:58,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2022-03-15 16:43:58,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1083. [2022-03-15 16:43:58,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 2.253234750462107) internal successors, (2438), 1082 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:58,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2438 transitions. [2022-03-15 16:43:58,155 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2438 transitions. Word has length 32 [2022-03-15 16:43:58,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:58,155 INFO L470 AbstractCegarLoop]: Abstraction has 1083 states and 2438 transitions. [2022-03-15 16:43:58,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:58,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2438 transitions. [2022-03-15 16:43:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:43:58,158 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:58,158 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:58,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:58,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 16:43:58,375 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:58,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:58,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1563537433, now seen corresponding path program 17 times [2022-03-15 16:43:58,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:58,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139072846] [2022-03-15 16:43:58,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:58,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:58,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:58,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139072846] [2022-03-15 16:43:58,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139072846] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:58,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190276677] [2022-03-15 16:43:58,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:43:58,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:58,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:58,587 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:58,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 16:43:58,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:43:58,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:58,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:43:58,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:58,844 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:58,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-15 16:43:58,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:58,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:58,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:43:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:58,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:59,102 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:43:59,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-15 16:43:59,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:43:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:59,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190276677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:59,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:59,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-03-15 16:43:59,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930694631] [2022-03-15 16:43:59,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:59,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:43:59,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:59,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:43:59,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:43:59,241 INFO L87 Difference]: Start difference. First operand 1083 states and 2438 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:59,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:59,382 INFO L93 Difference]: Finished difference Result 1155 states and 2591 transitions. [2022-03-15 16:43:59,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:43:59,382 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:43:59,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:59,385 INFO L225 Difference]: With dead ends: 1155 [2022-03-15 16:43:59,385 INFO L226 Difference]: Without dead ends: 1141 [2022-03-15 16:43:59,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:43:59,387 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:59,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 150 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 173 Invalid, 0 Unknown, 143 Unchecked, 0.0s Time] [2022-03-15 16:43:59,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-03-15 16:43:59,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1086. [2022-03-15 16:43:59,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 2.249769585253456) internal successors, (2441), 1085 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2441 transitions. [2022-03-15 16:43:59,438 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2441 transitions. Word has length 32 [2022-03-15 16:43:59,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:59,438 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 2441 transitions. [2022-03-15 16:43:59,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:59,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2441 transitions. [2022-03-15 16:43:59,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:43:59,440 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:59,440 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:59,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:59,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:59,640 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:59,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:59,641 INFO L85 PathProgramCache]: Analyzing trace with hash -889796407, now seen corresponding path program 18 times [2022-03-15 16:43:59,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:59,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266802763] [2022-03-15 16:43:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:59,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:59,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:59,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266802763] [2022-03-15 16:43:59,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266802763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:59,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925678657] [2022-03-15 16:43:59,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:43:59,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:59,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:59,783 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:59,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 16:43:59,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:43:59,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:59,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:43:59,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:59,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:59,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-03-15 16:44:00,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:00,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:00,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:44:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:00,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:00,376 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:00,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-15 16:44:00,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:00,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925678657] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:00,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:00,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-03-15 16:44:00,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549413832] [2022-03-15 16:44:00,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:00,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:44:00,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:00,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:44:00,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:44:00,504 INFO L87 Difference]: Start difference. First operand 1086 states and 2441 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:00,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:00,775 INFO L93 Difference]: Finished difference Result 1287 states and 2865 transitions. [2022-03-15 16:44:00,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:44:00,775 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:00,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:00,779 INFO L225 Difference]: With dead ends: 1287 [2022-03-15 16:44:00,779 INFO L226 Difference]: Without dead ends: 1267 [2022-03-15 16:44:00,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:44:00,780 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:00,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 140 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 195 Invalid, 0 Unknown, 241 Unchecked, 0.1s Time] [2022-03-15 16:44:00,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-03-15 16:44:00,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1147. [2022-03-15 16:44:00,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 2.244328097731239) internal successors, (2572), 1146 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:00,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 2572 transitions. [2022-03-15 16:44:00,808 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 2572 transitions. Word has length 32 [2022-03-15 16:44:00,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:00,808 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 2572 transitions. [2022-03-15 16:44:00,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:00,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 2572 transitions. [2022-03-15 16:44:00,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:00,810 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:00,810 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:00,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:01,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:01,023 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:01,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:01,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1976105177, now seen corresponding path program 19 times [2022-03-15 16:44:01,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:01,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611960016] [2022-03-15 16:44:01,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:01,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:01,230 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:01,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611960016] [2022-03-15 16:44:01,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611960016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:01,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603665921] [2022-03-15 16:44:01,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:44:01,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:01,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:01,232 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:01,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 16:44:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:01,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:44:01,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:01,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:01,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 16:44:01,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:01,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:01,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:44:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:01,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:01,767 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:01,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:44:01,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:01,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603665921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:01,847 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:01,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-03-15 16:44:01,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513776125] [2022-03-15 16:44:01,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:01,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:44:01,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:01,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:44:01,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:44:01,848 INFO L87 Difference]: Start difference. First operand 1147 states and 2572 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:02,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:02,022 INFO L93 Difference]: Finished difference Result 1262 states and 2801 transitions. [2022-03-15 16:44:02,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:44:02,022 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:02,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:02,029 INFO L225 Difference]: With dead ends: 1262 [2022-03-15 16:44:02,029 INFO L226 Difference]: Without dead ends: 1236 [2022-03-15 16:44:02,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:44:02,038 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 66 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:02,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 163 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 192 Invalid, 0 Unknown, 160 Unchecked, 0.1s Time] [2022-03-15 16:44:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-03-15 16:44:02,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1157. [2022-03-15 16:44:02,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.2422145328719725) internal successors, (2592), 1156 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:02,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2592 transitions. [2022-03-15 16:44:02,083 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2592 transitions. Word has length 32 [2022-03-15 16:44:02,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:02,083 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 2592 transitions. [2022-03-15 16:44:02,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:02,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2592 transitions. [2022-03-15 16:44:02,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:02,086 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:02,086 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:02,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:02,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:02,303 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:02,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:02,303 INFO L85 PathProgramCache]: Analyzing trace with hash -516998149, now seen corresponding path program 20 times [2022-03-15 16:44:02,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:02,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496455877] [2022-03-15 16:44:02,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:02,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:02,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:02,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496455877] [2022-03-15 16:44:02,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496455877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:02,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578107191] [2022-03-15 16:44:02,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:44:02,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:02,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:02,501 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:02,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 16:44:02,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:44:02,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:02,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:44:02,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:02,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:02,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 16:44:02,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:02,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:02,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:44:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:02,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:03,038 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:03,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:44:03,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:03,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578107191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:03,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:03,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-03-15 16:44:03,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807652629] [2022-03-15 16:44:03,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:03,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:44:03,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:03,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:44:03,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:44:03,169 INFO L87 Difference]: Start difference. First operand 1157 states and 2592 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:03,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:03,406 INFO L93 Difference]: Finished difference Result 1281 states and 2850 transitions. [2022-03-15 16:44:03,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:44:03,406 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:03,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:03,410 INFO L225 Difference]: With dead ends: 1281 [2022-03-15 16:44:03,410 INFO L226 Difference]: Without dead ends: 1260 [2022-03-15 16:44:03,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:44:03,411 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:03,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 208 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 307 Invalid, 0 Unknown, 203 Unchecked, 0.1s Time] [2022-03-15 16:44:03,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-03-15 16:44:03,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1165. [2022-03-15 16:44:03,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 2.2448453608247423) internal successors, (2613), 1164 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:03,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2613 transitions. [2022-03-15 16:44:03,425 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2613 transitions. Word has length 32 [2022-03-15 16:44:03,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:03,425 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 2613 transitions. [2022-03-15 16:44:03,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:03,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2613 transitions. [2022-03-15 16:44:03,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:03,430 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:03,430 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:03,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:03,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-15 16:44:03,647 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:03,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:03,647 INFO L85 PathProgramCache]: Analyzing trace with hash 495694383, now seen corresponding path program 21 times [2022-03-15 16:44:03,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:03,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709699403] [2022-03-15 16:44:03,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:03,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:03,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:03,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709699403] [2022-03-15 16:44:03,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709699403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:03,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078095643] [2022-03-15 16:44:03,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:44:03,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:03,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:03,867 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:03,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 16:44:03,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:44:03,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:03,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:44:03,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:04,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:04,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-03-15 16:44:04,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:04,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:04,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:04,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:44:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:04,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:04,459 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:04,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-15 16:44:04,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:04,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078095643] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:04,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:04,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-03-15 16:44:04,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134626394] [2022-03-15 16:44:04,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:04,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:44:04,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:04,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:44:04,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:44:04,579 INFO L87 Difference]: Start difference. First operand 1165 states and 2613 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:04,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:04,838 INFO L93 Difference]: Finished difference Result 1292 states and 2864 transitions. [2022-03-15 16:44:04,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:44:04,838 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:04,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:04,841 INFO L225 Difference]: With dead ends: 1292 [2022-03-15 16:44:04,841 INFO L226 Difference]: Without dead ends: 1268 [2022-03-15 16:44:04,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:44:04,842 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 72 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:04,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 158 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 260 Invalid, 0 Unknown, 203 Unchecked, 0.1s Time] [2022-03-15 16:44:04,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2022-03-15 16:44:04,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 1176. [2022-03-15 16:44:04,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 2.244255319148936) internal successors, (2637), 1175 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:04,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 2637 transitions. [2022-03-15 16:44:04,866 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 2637 transitions. Word has length 32 [2022-03-15 16:44:04,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:04,866 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 2637 transitions. [2022-03-15 16:44:04,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:04,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 2637 transitions. [2022-03-15 16:44:04,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:04,867 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:04,868 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:04,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:05,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-15 16:44:05,084 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:05,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:05,084 INFO L85 PathProgramCache]: Analyzing trace with hash -956375147, now seen corresponding path program 22 times [2022-03-15 16:44:05,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:05,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009939837] [2022-03-15 16:44:05,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:05,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:05,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:05,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009939837] [2022-03-15 16:44:05,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009939837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:05,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773448317] [2022-03-15 16:44:05,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:44:05,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:05,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:05,330 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:05,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 16:44:05,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:44:05,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:05,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:44:05,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:05,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:05,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 16:44:05,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:05,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:05,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:44:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:05,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:06,048 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:06,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:44:06,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:06,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773448317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:06,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:06,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 31 [2022-03-15 16:44:06,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817080199] [2022-03-15 16:44:06,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:06,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:44:06,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:06,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:44:06,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:44:06,144 INFO L87 Difference]: Start difference. First operand 1176 states and 2637 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:06,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:06,403 INFO L93 Difference]: Finished difference Result 1465 states and 3217 transitions. [2022-03-15 16:44:06,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:44:06,404 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:06,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:06,407 INFO L225 Difference]: With dead ends: 1465 [2022-03-15 16:44:06,407 INFO L226 Difference]: Without dead ends: 1415 [2022-03-15 16:44:06,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:44:06,408 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 131 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:06,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 163 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 302 Invalid, 0 Unknown, 142 Unchecked, 0.1s Time] [2022-03-15 16:44:06,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-03-15 16:44:06,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1212. [2022-03-15 16:44:06,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 2.255986787778695) internal successors, (2732), 1211 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 2732 transitions. [2022-03-15 16:44:06,427 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 2732 transitions. Word has length 32 [2022-03-15 16:44:06,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:06,427 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 2732 transitions. [2022-03-15 16:44:06,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:06,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 2732 transitions. [2022-03-15 16:44:06,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:06,429 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:06,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:06,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-15 16:44:06,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:06,643 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:06,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:06,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1996610945, now seen corresponding path program 23 times [2022-03-15 16:44:06,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:06,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639145155] [2022-03-15 16:44:06,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:06,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:06,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:06,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639145155] [2022-03-15 16:44:06,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639145155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:06,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757609405] [2022-03-15 16:44:06,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:44:06,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:06,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:06,843 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:06,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 16:44:06,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:44:06,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:06,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:44:06,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:07,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:07,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-03-15 16:44:07,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:07,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:07,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:07,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:44:07,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:07,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:07,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:07,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:07,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:07,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 57 [2022-03-15 16:44:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:07,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757609405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:07,456 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:07,456 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 36 [2022-03-15 16:44:07,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577857127] [2022-03-15 16:44:07,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:07,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:44:07,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:07,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:44:07,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:44:07,457 INFO L87 Difference]: Start difference. First operand 1212 states and 2732 transitions. Second operand has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:08,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:08,821 INFO L93 Difference]: Finished difference Result 2662 states and 5786 transitions. [2022-03-15 16:44:08,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 16:44:08,821 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:08,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:08,833 INFO L225 Difference]: With dead ends: 2662 [2022-03-15 16:44:08,833 INFO L226 Difference]: Without dead ends: 2469 [2022-03-15 16:44:08,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1014, Invalid=5628, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 16:44:08,835 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 340 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:08,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 379 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 922 Invalid, 0 Unknown, 416 Unchecked, 0.3s Time] [2022-03-15 16:44:08,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2022-03-15 16:44:08,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1440. [2022-03-15 16:44:08,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 2.244614315496873) internal successors, (3230), 1439 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:08,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 3230 transitions. [2022-03-15 16:44:08,897 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 3230 transitions. Word has length 32 [2022-03-15 16:44:08,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:08,897 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 3230 transitions. [2022-03-15 16:44:08,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:08,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 3230 transitions. [2022-03-15 16:44:08,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:08,899 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:08,899 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:08,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:09,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:09,116 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:09,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:09,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1401532203, now seen corresponding path program 24 times [2022-03-15 16:44:09,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:09,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539381480] [2022-03-15 16:44:09,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:09,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:09,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:09,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539381480] [2022-03-15 16:44:09,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539381480] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:09,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130267868] [2022-03-15 16:44:09,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:44:09,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:09,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:09,315 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:09,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 16:44:09,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:44:09,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:09,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:44:09,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:09,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:09,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-03-15 16:44:09,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:09,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:09,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:44:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:09,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:09,756 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:09,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-15 16:44:09,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:09,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130267868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:09,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:09,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-03-15 16:44:09,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3346021] [2022-03-15 16:44:09,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:09,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:44:09,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:09,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:44:09,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:44:09,869 INFO L87 Difference]: Start difference. First operand 1440 states and 3230 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:10,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:10,149 INFO L93 Difference]: Finished difference Result 1680 states and 3724 transitions. [2022-03-15 16:44:10,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:44:10,149 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:10,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:10,152 INFO L225 Difference]: With dead ends: 1680 [2022-03-15 16:44:10,152 INFO L226 Difference]: Without dead ends: 1666 [2022-03-15 16:44:10,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=269, Invalid=1213, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:44:10,153 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 139 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:10,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 202 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 215 Invalid, 0 Unknown, 250 Unchecked, 0.1s Time] [2022-03-15 16:44:10,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2022-03-15 16:44:10,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1487. [2022-03-15 16:44:10,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 2.2476446837146704) internal successors, (3340), 1486 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 3340 transitions. [2022-03-15 16:44:10,170 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 3340 transitions. Word has length 32 [2022-03-15 16:44:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:10,170 INFO L470 AbstractCegarLoop]: Abstraction has 1487 states and 3340 transitions. [2022-03-15 16:44:10,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:10,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 3340 transitions. [2022-03-15 16:44:10,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:10,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:10,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:10,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:10,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-15 16:44:10,388 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:10,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:10,388 INFO L85 PathProgramCache]: Analyzing trace with hash 809339119, now seen corresponding path program 25 times [2022-03-15 16:44:10,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:10,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449157609] [2022-03-15 16:44:10,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:10,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:10,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:10,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449157609] [2022-03-15 16:44:10,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449157609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:10,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239679369] [2022-03-15 16:44:10,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:44:10,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:10,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:10,586 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:10,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 16:44:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:10,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:44:10,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:10,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:10,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 16:44:10,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:10,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:10,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:44:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:10,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:11,072 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:11,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:44:11,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:11,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239679369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:11,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:11,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-03-15 16:44:11,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022275594] [2022-03-15 16:44:11,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:11,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:44:11,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:11,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:44:11,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:44:11,143 INFO L87 Difference]: Start difference. First operand 1487 states and 3340 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:11,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:11,361 INFO L93 Difference]: Finished difference Result 1626 states and 3621 transitions. [2022-03-15 16:44:11,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:44:11,361 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:11,364 INFO L225 Difference]: With dead ends: 1626 [2022-03-15 16:44:11,364 INFO L226 Difference]: Without dead ends: 1610 [2022-03-15 16:44:11,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:44:11,365 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 103 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:11,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 169 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 304 Invalid, 0 Unknown, 179 Unchecked, 0.1s Time] [2022-03-15 16:44:11,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2022-03-15 16:44:11,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1486. [2022-03-15 16:44:11,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 2.2471380471380473) internal successors, (3337), 1485 states have internal predecessors, (3337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 3337 transitions. [2022-03-15 16:44:11,382 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 3337 transitions. Word has length 32 [2022-03-15 16:44:11,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:11,383 INFO L470 AbstractCegarLoop]: Abstraction has 1486 states and 3337 transitions. [2022-03-15 16:44:11,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:11,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 3337 transitions. [2022-03-15 16:44:11,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:11,384 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:11,384 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:11,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-15 16:44:11,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-15 16:44:11,595 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:11,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:11,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1602633313, now seen corresponding path program 26 times [2022-03-15 16:44:11,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:11,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126598739] [2022-03-15 16:44:11,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:11,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:11,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:11,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126598739] [2022-03-15 16:44:11,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126598739] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:11,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174368807] [2022-03-15 16:44:11,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:44:11,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:11,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:11,823 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:11,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 16:44:11,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:44:11,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:11,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:44:11,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:12,094 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:12,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:44:12,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:12,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:12,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:12,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:44:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:12,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:12,498 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:12,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:44:12,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:12,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174368807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:12,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:12,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-03-15 16:44:12,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408728949] [2022-03-15 16:44:12,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:12,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:44:12,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:12,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:44:12,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:44:12,601 INFO L87 Difference]: Start difference. First operand 1486 states and 3337 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:12,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:12,831 INFO L93 Difference]: Finished difference Result 1659 states and 3686 transitions. [2022-03-15 16:44:12,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:44:12,831 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:12,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:12,834 INFO L225 Difference]: With dead ends: 1659 [2022-03-15 16:44:12,834 INFO L226 Difference]: Without dead ends: 1645 [2022-03-15 16:44:12,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:44:12,834 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:12,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 160 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 258 Invalid, 0 Unknown, 198 Unchecked, 0.1s Time] [2022-03-15 16:44:12,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-03-15 16:44:12,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1494. [2022-03-15 16:44:12,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.245813797722706) internal successors, (3353), 1493 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:12,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3353 transitions. [2022-03-15 16:44:12,850 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3353 transitions. Word has length 32 [2022-03-15 16:44:12,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:12,850 INFO L470 AbstractCegarLoop]: Abstraction has 1494 states and 3353 transitions. [2022-03-15 16:44:12,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:12,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3353 transitions. [2022-03-15 16:44:12,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:12,852 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:12,852 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:12,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:13,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-15 16:44:13,068 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:13,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:13,068 INFO L85 PathProgramCache]: Analyzing trace with hash -117543987, now seen corresponding path program 27 times [2022-03-15 16:44:13,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:13,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673475716] [2022-03-15 16:44:13,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:13,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:13,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:13,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:13,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673475716] [2022-03-15 16:44:13,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673475716] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:13,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478694747] [2022-03-15 16:44:13,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:44:13,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:13,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:13,223 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:13,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 16:44:13,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:44:13,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:13,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:44:13,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:13,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:13,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-15 16:44:13,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:13,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2022-03-15 16:44:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:13,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:14,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:14,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:14,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 45 [2022-03-15 16:44:14,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:14,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478694747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:14,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:14,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 35 [2022-03-15 16:44:14,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755520695] [2022-03-15 16:44:14,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:14,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:44:14,649 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:14,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:44:14,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:44:14,650 INFO L87 Difference]: Start difference. First operand 1494 states and 3353 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:15,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:15,045 INFO L93 Difference]: Finished difference Result 1596 states and 3554 transitions. [2022-03-15 16:44:15,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:44:15,046 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:15,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:15,048 INFO L225 Difference]: With dead ends: 1596 [2022-03-15 16:44:15,048 INFO L226 Difference]: Without dead ends: 1563 [2022-03-15 16:44:15,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=445, Invalid=2105, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:44:15,051 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 160 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:15,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 252 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 206 Invalid, 0 Unknown, 433 Unchecked, 0.1s Time] [2022-03-15 16:44:15,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2022-03-15 16:44:15,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1505. [2022-03-15 16:44:15,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 2.2513297872340425) internal successors, (3386), 1504 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:15,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 3386 transitions. [2022-03-15 16:44:15,069 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 3386 transitions. Word has length 32 [2022-03-15 16:44:15,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:15,069 INFO L470 AbstractCegarLoop]: Abstraction has 1505 states and 3386 transitions. [2022-03-15 16:44:15,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:15,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 3386 transitions. [2022-03-15 16:44:15,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:15,077 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:15,077 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:15,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-15 16:44:15,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 16:44:15,292 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:15,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:15,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1140541965, now seen corresponding path program 28 times [2022-03-15 16:44:15,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:15,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202257615] [2022-03-15 16:44:15,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:15,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:15,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:44:15,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:15,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202257615] [2022-03-15 16:44:15,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202257615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:15,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702353319] [2022-03-15 16:44:15,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:44:15,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:15,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:15,452 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:15,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 16:44:15,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:44:15,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:15,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:44:15,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:15,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:15,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:44:15,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:15,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:15,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:44:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:15,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:16,115 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:16,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:44:16,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:16,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702353319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:16,256 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:16,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-03-15 16:44:16,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740959013] [2022-03-15 16:44:16,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:16,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:44:16,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:16,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:44:16,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:44:16,257 INFO L87 Difference]: Start difference. First operand 1505 states and 3386 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:16,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:16,438 INFO L93 Difference]: Finished difference Result 1850 states and 4103 transitions. [2022-03-15 16:44:16,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:44:16,439 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:16,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:16,441 INFO L225 Difference]: With dead ends: 1850 [2022-03-15 16:44:16,441 INFO L226 Difference]: Without dead ends: 1756 [2022-03-15 16:44:16,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:44:16,442 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 136 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:16,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 264 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 234 Invalid, 0 Unknown, 372 Unchecked, 0.1s Time] [2022-03-15 16:44:16,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2022-03-15 16:44:16,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1578. [2022-03-15 16:44:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 2.25428027901078) internal successors, (3555), 1577 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:16,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 3555 transitions. [2022-03-15 16:44:16,460 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 3555 transitions. Word has length 32 [2022-03-15 16:44:16,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:16,460 INFO L470 AbstractCegarLoop]: Abstraction has 1578 states and 3555 transitions. [2022-03-15 16:44:16,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:16,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 3555 transitions. [2022-03-15 16:44:16,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:16,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:16,463 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:16,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:16,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:16,678 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:16,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:16,679 INFO L85 PathProgramCache]: Analyzing trace with hash 968255547, now seen corresponding path program 29 times [2022-03-15 16:44:16,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:16,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707422371] [2022-03-15 16:44:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:16,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:44:16,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:16,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707422371] [2022-03-15 16:44:16,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707422371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:16,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627816929] [2022-03-15 16:44:16,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:44:16,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:16,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:16,863 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:16,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 16:44:16,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:44:16,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:16,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:44:16,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:17,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:17,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-15 16:44:17,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:17,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:17,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:17,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:44:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:17,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:17,314 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:17,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-15 16:44:17,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:17,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627816929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:17,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:17,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-03-15 16:44:17,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277127192] [2022-03-15 16:44:17,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:17,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:44:17,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:17,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:44:17,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:44:17,445 INFO L87 Difference]: Start difference. First operand 1578 states and 3555 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:17,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:17,707 INFO L93 Difference]: Finished difference Result 2252 states and 4991 transitions. [2022-03-15 16:44:17,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:44:17,707 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:17,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:17,711 INFO L225 Difference]: With dead ends: 2252 [2022-03-15 16:44:17,711 INFO L226 Difference]: Without dead ends: 2140 [2022-03-15 16:44:17,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:44:17,711 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 177 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:17,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 240 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 243 Invalid, 0 Unknown, 575 Unchecked, 0.1s Time] [2022-03-15 16:44:17,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2022-03-15 16:44:17,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1707. [2022-03-15 16:44:17,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1707 states, 1706 states have (on average 2.2626025791324738) internal successors, (3860), 1706 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:17,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 3860 transitions. [2022-03-15 16:44:17,733 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 3860 transitions. Word has length 32 [2022-03-15 16:44:17,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:17,734 INFO L470 AbstractCegarLoop]: Abstraction has 1707 states and 3860 transitions. [2022-03-15 16:44:17,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:17,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 3860 transitions. [2022-03-15 16:44:17,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:17,736 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:17,736 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:17,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:17,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:17,951 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:17,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:17,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1980948079, now seen corresponding path program 30 times [2022-03-15 16:44:17,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:17,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737090224] [2022-03-15 16:44:17,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:17,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:44:18,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:18,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737090224] [2022-03-15 16:44:18,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737090224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:18,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980688080] [2022-03-15 16:44:18,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:44:18,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:18,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:18,139 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:18,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 16:44:18,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:44:18,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:18,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:44:18,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:18,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:18,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-15 16:44:18,486 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:44:18,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:44:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:18,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:18,791 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:18,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-15 16:44:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:18,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980688080] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:18,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:18,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2022-03-15 16:44:18,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804442639] [2022-03-15 16:44:18,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:18,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:44:18,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:18,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:44:18,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:44:18,933 INFO L87 Difference]: Start difference. First operand 1707 states and 3860 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:19,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:19,405 INFO L93 Difference]: Finished difference Result 2522 states and 5549 transitions. [2022-03-15 16:44:19,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:44:19,406 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:19,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:19,409 INFO L225 Difference]: With dead ends: 2522 [2022-03-15 16:44:19,409 INFO L226 Difference]: Without dead ends: 2400 [2022-03-15 16:44:19,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=2581, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 16:44:19,411 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 248 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 320 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:19,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 203 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 471 Invalid, 0 Unknown, 320 Unchecked, 0.2s Time] [2022-03-15 16:44:19,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2022-03-15 16:44:19,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1538. [2022-03-15 16:44:19,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.2485361093038385) internal successors, (3456), 1537 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:19,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 3456 transitions. [2022-03-15 16:44:19,433 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 3456 transitions. Word has length 32 [2022-03-15 16:44:19,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:19,433 INFO L470 AbstractCegarLoop]: Abstraction has 1538 states and 3456 transitions. [2022-03-15 16:44:19,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:19,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 3456 transitions. [2022-03-15 16:44:19,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:19,435 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:19,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:19,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:19,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-15 16:44:19,650 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:19,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:19,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1077914535, now seen corresponding path program 31 times [2022-03-15 16:44:19,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:19,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573508901] [2022-03-15 16:44:19,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:19,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:19,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:19,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573508901] [2022-03-15 16:44:19,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573508901] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:19,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313249215] [2022-03-15 16:44:19,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:44:19,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:19,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:19,781 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:19,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 16:44:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:19,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:44:19,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:19,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:19,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:44:20,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:20,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:20,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:20,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:44:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:20,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:20,249 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:20,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:44:20,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:20,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313249215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:20,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:20,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-03-15 16:44:20,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681897764] [2022-03-15 16:44:20,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:20,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:44:20,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:20,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:44:20,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:44:20,451 INFO L87 Difference]: Start difference. First operand 1538 states and 3456 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:21,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:21,226 INFO L93 Difference]: Finished difference Result 2813 states and 6181 transitions. [2022-03-15 16:44:21,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:44:21,226 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:21,230 INFO L225 Difference]: With dead ends: 2813 [2022-03-15 16:44:21,230 INFO L226 Difference]: Without dead ends: 2550 [2022-03-15 16:44:21,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 53 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=576, Invalid=2846, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 16:44:21,231 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 288 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1159 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:21,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 439 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 629 Invalid, 0 Unknown, 1159 Unchecked, 0.2s Time] [2022-03-15 16:44:21,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2022-03-15 16:44:21,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 1860. [2022-03-15 16:44:21,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 2.2501344809037116) internal successors, (4183), 1859 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:21,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 4183 transitions. [2022-03-15 16:44:21,259 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 4183 transitions. Word has length 32 [2022-03-15 16:44:21,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:21,259 INFO L470 AbstractCegarLoop]: Abstraction has 1860 states and 4183 transitions. [2022-03-15 16:44:21,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:21,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 4183 transitions. [2022-03-15 16:44:21,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:21,261 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:21,261 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:21,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:21,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:21,478 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:21,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:21,478 INFO L85 PathProgramCache]: Analyzing trace with hash 282445069, now seen corresponding path program 32 times [2022-03-15 16:44:21,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:21,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520392818] [2022-03-15 16:44:21,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:21,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:21,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:21,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520392818] [2022-03-15 16:44:21,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520392818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:21,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122906014] [2022-03-15 16:44:21,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:44:21,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:21,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:21,629 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:21,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 16:44:21,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:44:21,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:21,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:44:21,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:21,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:21,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:44:21,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:21,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:21,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:44:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:21,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:22,260 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:22,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:44:22,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:22,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122906014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:22,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:22,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-03-15 16:44:22,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243184288] [2022-03-15 16:44:22,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:22,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:44:22,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:22,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:44:22,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:44:22,479 INFO L87 Difference]: Start difference. First operand 1860 states and 4183 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:23,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:23,011 INFO L93 Difference]: Finished difference Result 2130 states and 4721 transitions. [2022-03-15 16:44:23,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:44:23,011 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:23,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:23,014 INFO L225 Difference]: With dead ends: 2130 [2022-03-15 16:44:23,014 INFO L226 Difference]: Without dead ends: 2102 [2022-03-15 16:44:23,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=350, Invalid=2002, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:44:23,015 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:23,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 170 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 317 Invalid, 0 Unknown, 388 Unchecked, 0.1s Time] [2022-03-15 16:44:23,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2022-03-15 16:44:23,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 1894. [2022-03-15 16:44:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 2.2519809825673534) internal successors, (4263), 1893 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 4263 transitions. [2022-03-15 16:44:23,038 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 4263 transitions. Word has length 32 [2022-03-15 16:44:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:23,039 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 4263 transitions. [2022-03-15 16:44:23,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:23,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 4263 transitions. [2022-03-15 16:44:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:23,041 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:23,041 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:23,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:23,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:23,256 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:23,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:23,257 INFO L85 PathProgramCache]: Analyzing trace with hash 458576657, now seen corresponding path program 33 times [2022-03-15 16:44:23,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:23,257 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984357145] [2022-03-15 16:44:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:23,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:23,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:23,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984357145] [2022-03-15 16:44:23,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984357145] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:23,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652604211] [2022-03-15 16:44:23,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:44:23,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:23,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:23,420 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:23,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 16:44:23,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:44:23,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:23,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:44:23,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:23,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:23,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:44:23,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:23,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:23,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:44:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:23,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:24,077 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:24,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:44:24,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:24,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652604211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:24,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:24,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-03-15 16:44:24,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570938349] [2022-03-15 16:44:24,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:24,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:44:24,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:24,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:44:24,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:44:24,215 INFO L87 Difference]: Start difference. First operand 1894 states and 4263 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:24,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:24,864 INFO L93 Difference]: Finished difference Result 2381 states and 5316 transitions. [2022-03-15 16:44:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:44:24,864 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:24,867 INFO L225 Difference]: With dead ends: 2381 [2022-03-15 16:44:24,867 INFO L226 Difference]: Without dead ends: 2304 [2022-03-15 16:44:24,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=453, Invalid=1997, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:44:24,868 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 160 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:24,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 268 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 409 Invalid, 0 Unknown, 444 Unchecked, 0.2s Time] [2022-03-15 16:44:24,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2022-03-15 16:44:24,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2022. [2022-03-15 16:44:24,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 2.256308758040574) internal successors, (4560), 2021 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:24,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 4560 transitions. [2022-03-15 16:44:24,894 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 4560 transitions. Word has length 32 [2022-03-15 16:44:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:24,894 INFO L470 AbstractCegarLoop]: Abstraction has 2022 states and 4560 transitions. [2022-03-15 16:44:24,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 4560 transitions. [2022-03-15 16:44:24,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:24,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:24,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:24,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:25,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-15 16:44:25,114 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:25,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:25,114 INFO L85 PathProgramCache]: Analyzing trace with hash -362600081, now seen corresponding path program 34 times [2022-03-15 16:44:25,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:25,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115602277] [2022-03-15 16:44:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:25,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:25,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:25,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115602277] [2022-03-15 16:44:25,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115602277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:25,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971934263] [2022-03-15 16:44:25,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:44:25,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:25,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:25,292 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:25,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 16:44:25,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:44:25,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:25,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:44:25,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:25,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:25,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:44:25,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:25,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:25,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:44:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:25,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:25,761 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:25,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:44:25,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:25,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971934263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:25,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:25,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-03-15 16:44:25,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933887864] [2022-03-15 16:44:25,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:25,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:44:25,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:25,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:44:25,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:44:25,897 INFO L87 Difference]: Start difference. First operand 2022 states and 4560 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:26,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:26,292 INFO L93 Difference]: Finished difference Result 2174 states and 4888 transitions. [2022-03-15 16:44:26,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:44:26,292 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:26,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:26,295 INFO L225 Difference]: With dead ends: 2174 [2022-03-15 16:44:26,295 INFO L226 Difference]: Without dead ends: 2154 [2022-03-15 16:44:26,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=1577, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:44:26,295 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 72 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:26,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 159 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 231 Invalid, 0 Unknown, 326 Unchecked, 0.1s Time] [2022-03-15 16:44:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2022-03-15 16:44:26,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2043. [2022-03-15 16:44:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 2042 states have (on average 2.254162585700294) internal successors, (4603), 2042 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:26,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 4603 transitions. [2022-03-15 16:44:26,352 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 4603 transitions. Word has length 32 [2022-03-15 16:44:26,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:26,352 INFO L470 AbstractCegarLoop]: Abstraction has 2043 states and 4603 transitions. [2022-03-15 16:44:26,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:26,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 4603 transitions. [2022-03-15 16:44:26,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:26,355 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:26,355 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:26,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:26,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-15 16:44:26,555 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:26,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:26,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1350073971, now seen corresponding path program 35 times [2022-03-15 16:44:26,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:26,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536616458] [2022-03-15 16:44:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:26,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:26,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:26,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536616458] [2022-03-15 16:44:26,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536616458] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:26,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416713934] [2022-03-15 16:44:26,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:44:26,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:26,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:26,747 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:26,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 16:44:26,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:44:26,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:26,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:44:26,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:27,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:27,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-03-15 16:44:27,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:27,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:27,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:44:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:27,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:27,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:27,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:27,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:27,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 57 [2022-03-15 16:44:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:27,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416713934] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:27,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:27,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-03-15 16:44:27,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435896005] [2022-03-15 16:44:27,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:27,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:44:27,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:27,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:44:27,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:44:27,642 INFO L87 Difference]: Start difference. First operand 2043 states and 4603 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:28,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:28,536 INFO L93 Difference]: Finished difference Result 2682 states and 5975 transitions. [2022-03-15 16:44:28,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:44:28,536 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:28,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:28,540 INFO L225 Difference]: With dead ends: 2682 [2022-03-15 16:44:28,540 INFO L226 Difference]: Without dead ends: 2649 [2022-03-15 16:44:28,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=650, Invalid=3132, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 16:44:28,540 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 223 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 521 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:28,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 216 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 536 Invalid, 0 Unknown, 521 Unchecked, 0.2s Time] [2022-03-15 16:44:28,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2022-03-15 16:44:28,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2201. [2022-03-15 16:44:28,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.255) internal successors, (4961), 2200 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 4961 transitions. [2022-03-15 16:44:28,566 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 4961 transitions. Word has length 32 [2022-03-15 16:44:28,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:28,566 INFO L470 AbstractCegarLoop]: Abstraction has 2201 states and 4961 transitions. [2022-03-15 16:44:28,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:28,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 4961 transitions. [2022-03-15 16:44:28,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:28,568 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:28,568 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:28,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:28,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 16:44:28,784 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:28,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1516422259, now seen corresponding path program 36 times [2022-03-15 16:44:28,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:28,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966068389] [2022-03-15 16:44:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:28,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:28,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:28,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966068389] [2022-03-15 16:44:28,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966068389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:28,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796779235] [2022-03-15 16:44:28,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:44:28,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:28,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:28,969 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:28,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 16:44:28,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:44:28,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:28,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:44:28,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:29,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:29,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-03-15 16:44:29,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:29,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:29,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:44:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:29,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:29,661 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:29,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-15 16:44:29,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:29,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796779235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:29,802 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:29,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-03-15 16:44:29,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490635832] [2022-03-15 16:44:29,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:29,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:44:29,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:29,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:44:29,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:44:29,802 INFO L87 Difference]: Start difference. First operand 2201 states and 4961 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:30,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:30,273 INFO L93 Difference]: Finished difference Result 2948 states and 6539 transitions. [2022-03-15 16:44:30,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:44:30,273 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:30,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:30,277 INFO L225 Difference]: With dead ends: 2948 [2022-03-15 16:44:30,277 INFO L226 Difference]: Without dead ends: 2823 [2022-03-15 16:44:30,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:44:30,277 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 147 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 725 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:30,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 316 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 423 Invalid, 0 Unknown, 725 Unchecked, 0.2s Time] [2022-03-15 16:44:30,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2022-03-15 16:44:30,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2454. [2022-03-15 16:44:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2454 states, 2453 states have (on average 2.2592743579290664) internal successors, (5542), 2453 states have internal predecessors, (5542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:30,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2454 states to 2454 states and 5542 transitions. [2022-03-15 16:44:30,306 INFO L78 Accepts]: Start accepts. Automaton has 2454 states and 5542 transitions. Word has length 32 [2022-03-15 16:44:30,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:30,306 INFO L470 AbstractCegarLoop]: Abstraction has 2454 states and 5542 transitions. [2022-03-15 16:44:30,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:30,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2454 states and 5542 transitions. [2022-03-15 16:44:30,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:30,309 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:30,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:30,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:30,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:30,523 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:30,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:30,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1972305753, now seen corresponding path program 37 times [2022-03-15 16:44:30,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:30,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902842312] [2022-03-15 16:44:30,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:30,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:30,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:30,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902842312] [2022-03-15 16:44:30,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902842312] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:30,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501683933] [2022-03-15 16:44:30,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:44:30,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:30,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:30,719 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:30,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 16:44:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:30,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:44:30,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:30,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:30,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 16:44:31,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:31,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:31,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:31,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:44:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:31,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:31,313 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:31,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:44:31,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:31,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501683933] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:31,411 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:31,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-03-15 16:44:31,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77548708] [2022-03-15 16:44:31,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:31,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:44:31,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:31,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:44:31,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:44:31,412 INFO L87 Difference]: Start difference. First operand 2454 states and 5542 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:31,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:31,680 INFO L93 Difference]: Finished difference Result 4067 states and 9106 transitions. [2022-03-15 16:44:31,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:44:31,681 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:31,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:31,685 INFO L225 Difference]: With dead ends: 4067 [2022-03-15 16:44:31,685 INFO L226 Difference]: Without dead ends: 4040 [2022-03-15 16:44:31,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:44:31,686 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 115 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 385 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:31,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 288 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 305 Invalid, 0 Unknown, 385 Unchecked, 0.1s Time] [2022-03-15 16:44:31,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4040 states. [2022-03-15 16:44:31,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4040 to 2635. [2022-03-15 16:44:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 2.2649962034927866) internal successors, (5966), 2634 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 5966 transitions. [2022-03-15 16:44:31,719 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 5966 transitions. Word has length 32 [2022-03-15 16:44:31,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:31,719 INFO L470 AbstractCegarLoop]: Abstraction has 2635 states and 5966 transitions. [2022-03-15 16:44:31,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:31,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 5966 transitions. [2022-03-15 16:44:31,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:31,722 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:31,722 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:31,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:31,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 16:44:31,939 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:31,939 INFO L85 PathProgramCache]: Analyzing trace with hash 804520611, now seen corresponding path program 38 times [2022-03-15 16:44:31,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:31,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766213829] [2022-03-15 16:44:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:31,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:32,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:32,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766213829] [2022-03-15 16:44:32,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766213829] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:32,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689205071] [2022-03-15 16:44:32,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:44:32,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:32,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:32,141 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:32,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 16:44:32,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:44:32,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:32,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:44:32,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:32,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:32,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-03-15 16:44:32,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:32,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:32,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:44:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:32,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:32,813 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:32,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-15 16:44:32,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:32,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689205071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:32,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:32,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-03-15 16:44:32,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668051330] [2022-03-15 16:44:32,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:32,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:44:32,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:32,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:44:32,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:44:32,963 INFO L87 Difference]: Start difference. First operand 2635 states and 5966 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:33,269 INFO L93 Difference]: Finished difference Result 3211 states and 7172 transitions. [2022-03-15 16:44:33,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:44:33,269 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:33,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:33,273 INFO L225 Difference]: With dead ends: 3211 [2022-03-15 16:44:33,273 INFO L226 Difference]: Without dead ends: 3145 [2022-03-15 16:44:33,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:44:33,274 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 132 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 617 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:33,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 241 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 341 Invalid, 0 Unknown, 617 Unchecked, 0.1s Time] [2022-03-15 16:44:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2022-03-15 16:44:33,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 2696. [2022-03-15 16:44:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 2695 states have (on average 2.2608534322820035) internal successors, (6093), 2695 states have internal predecessors, (6093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:33,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 6093 transitions. [2022-03-15 16:44:33,304 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 6093 transitions. Word has length 32 [2022-03-15 16:44:33,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:33,304 INFO L470 AbstractCegarLoop]: Abstraction has 2696 states and 6093 transitions. [2022-03-15 16:44:33,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:33,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 6093 transitions. [2022-03-15 16:44:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:33,307 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:33,307 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:33,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:33,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 16:44:33,524 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:33,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:33,524 INFO L85 PathProgramCache]: Analyzing trace with hash 349061555, now seen corresponding path program 39 times [2022-03-15 16:44:33,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:33,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377493570] [2022-03-15 16:44:33,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:33,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:33,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:33,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377493570] [2022-03-15 16:44:33,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377493570] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:33,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995974916] [2022-03-15 16:44:33,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:44:33,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:33,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:33,735 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:33,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 16:44:33,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:44:33,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:33,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:44:33,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:33,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:33,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-03-15 16:44:34,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:34,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:34,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2022-03-15 16:44:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:34,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:34,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:34,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:34,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:34,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:34,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-03-15 16:44:35,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:35,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:44:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:35,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995974916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:35,184 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:35,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 39 [2022-03-15 16:44:35,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656084490] [2022-03-15 16:44:35,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:35,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:44:35,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:35,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:44:35,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:44:35,185 INFO L87 Difference]: Start difference. First operand 2696 states and 6093 transitions. Second operand has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:36,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:36,666 INFO L93 Difference]: Finished difference Result 3668 states and 8214 transitions. [2022-03-15 16:44:36,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 16:44:36,666 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:36,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:36,670 INFO L225 Difference]: With dead ends: 3668 [2022-03-15 16:44:36,671 INFO L226 Difference]: Without dead ends: 3548 [2022-03-15 16:44:36,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1004, Invalid=5002, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 16:44:36,671 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 299 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1145 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:36,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 603 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 313 Invalid, 0 Unknown, 1145 Unchecked, 0.1s Time] [2022-03-15 16:44:36,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2022-03-15 16:44:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 2929. [2022-03-15 16:44:36,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2929 states, 2928 states have (on average 2.2575136612021858) internal successors, (6610), 2928 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2929 states to 2929 states and 6610 transitions. [2022-03-15 16:44:36,706 INFO L78 Accepts]: Start accepts. Automaton has 2929 states and 6610 transitions. Word has length 32 [2022-03-15 16:44:36,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:36,706 INFO L470 AbstractCegarLoop]: Abstraction has 2929 states and 6610 transitions. [2022-03-15 16:44:36,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:36,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2929 states and 6610 transitions. [2022-03-15 16:44:36,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:36,709 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:36,709 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:36,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:36,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:36,925 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:36,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:36,926 INFO L85 PathProgramCache]: Analyzing trace with hash -2145543437, now seen corresponding path program 40 times [2022-03-15 16:44:36,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:36,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502547962] [2022-03-15 16:44:36,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:36,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:37,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:37,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502547962] [2022-03-15 16:44:37,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502547962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:37,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218138519] [2022-03-15 16:44:37,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:44:37,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:37,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:37,124 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:37,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 16:44:37,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:44:37,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:37,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:44:37,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:37,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:37,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 16:44:37,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:37,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:37,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:44:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:37,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:37,749 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:37,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:44:37,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:37,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218138519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:37,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:37,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-03-15 16:44:37,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662865828] [2022-03-15 16:44:37,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:37,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:44:37,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:37,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:44:37,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:44:37,878 INFO L87 Difference]: Start difference. First operand 2929 states and 6610 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:38,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:38,289 INFO L93 Difference]: Finished difference Result 4509 states and 10100 transitions. [2022-03-15 16:44:38,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:44:38,289 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:38,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:38,295 INFO L225 Difference]: With dead ends: 4509 [2022-03-15 16:44:38,296 INFO L226 Difference]: Without dead ends: 4467 [2022-03-15 16:44:38,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=438, Invalid=1724, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:44:38,296 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 161 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 514 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:38,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 296 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 406 Invalid, 0 Unknown, 514 Unchecked, 0.1s Time] [2022-03-15 16:44:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2022-03-15 16:44:38,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 3295. [2022-03-15 16:44:38,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 2.2726168791742563) internal successors, (7486), 3294 states have internal predecessors, (7486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:38,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 7486 transitions. [2022-03-15 16:44:38,340 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 7486 transitions. Word has length 32 [2022-03-15 16:44:38,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:38,341 INFO L470 AbstractCegarLoop]: Abstraction has 3295 states and 7486 transitions. [2022-03-15 16:44:38,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:38,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 7486 transitions. [2022-03-15 16:44:38,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:38,344 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:38,344 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:38,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:38,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-15 16:44:38,560 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:38,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:38,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1639171119, now seen corresponding path program 41 times [2022-03-15 16:44:38,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:38,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266434739] [2022-03-15 16:44:38,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:38,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:38,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:38,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266434739] [2022-03-15 16:44:38,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266434739] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:38,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508829663] [2022-03-15 16:44:38,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:44:38,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:38,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:38,717 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:38,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 16:44:38,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:44:38,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:38,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:44:38,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:38,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:38,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-03-15 16:44:39,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:39,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:39,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:44:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:39,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:39,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:39,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:39,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:39,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 57 [2022-03-15 16:44:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:39,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508829663] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:39,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:39,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 34 [2022-03-15 16:44:39,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162754353] [2022-03-15 16:44:39,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:39,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:44:39,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:39,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:44:39,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:44:39,584 INFO L87 Difference]: Start difference. First operand 3295 states and 7486 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:40,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:40,705 INFO L93 Difference]: Finished difference Result 5882 states and 13176 transitions. [2022-03-15 16:44:40,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:44:40,705 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:40,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:40,713 INFO L225 Difference]: With dead ends: 5882 [2022-03-15 16:44:40,713 INFO L226 Difference]: Without dead ends: 5674 [2022-03-15 16:44:40,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 63 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=867, Invalid=4389, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 16:44:40,715 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 348 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 517 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:40,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 390 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 719 Invalid, 0 Unknown, 517 Unchecked, 0.3s Time] [2022-03-15 16:44:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2022-03-15 16:44:40,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 3749. [2022-03-15 16:44:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3749 states, 3748 states have (on average 2.2716115261472787) internal successors, (8514), 3748 states have internal predecessors, (8514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3749 states to 3749 states and 8514 transitions. [2022-03-15 16:44:40,772 INFO L78 Accepts]: Start accepts. Automaton has 3749 states and 8514 transitions. Word has length 32 [2022-03-15 16:44:40,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:40,774 INFO L470 AbstractCegarLoop]: Abstraction has 3749 states and 8514 transitions. [2022-03-15 16:44:40,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:40,783 INFO L276 IsEmpty]: Start isEmpty. Operand 3749 states and 8514 transitions. [2022-03-15 16:44:40,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:40,803 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:40,803 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:40,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:41,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:41,019 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:41,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:41,020 INFO L85 PathProgramCache]: Analyzing trace with hash 251124075, now seen corresponding path program 42 times [2022-03-15 16:44:41,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:41,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943704637] [2022-03-15 16:44:41,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:41,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:41,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:41,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943704637] [2022-03-15 16:44:41,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943704637] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:41,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615665235] [2022-03-15 16:44:41,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:44:41,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:41,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:41,208 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:41,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 16:44:41,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:44:41,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:41,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:44:41,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:41,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:41,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-03-15 16:44:41,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:41,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:41,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:41,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:44:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:41,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:41,645 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:41,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-15 16:44:41,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:41,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615665235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:41,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:41,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 28 [2022-03-15 16:44:41,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896887535] [2022-03-15 16:44:41,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:41,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:44:41,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:41,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:44:41,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:44:41,752 INFO L87 Difference]: Start difference. First operand 3749 states and 8514 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:41,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:41,889 INFO L93 Difference]: Finished difference Result 4320 states and 9774 transitions. [2022-03-15 16:44:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:44:41,890 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:41,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:41,895 INFO L225 Difference]: With dead ends: 4320 [2022-03-15 16:44:41,895 INFO L226 Difference]: Without dead ends: 4280 [2022-03-15 16:44:41,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:44:41,895 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:41,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 197 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 191 Invalid, 0 Unknown, 268 Unchecked, 0.1s Time] [2022-03-15 16:44:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4280 states. [2022-03-15 16:44:41,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4280 to 3804. [2022-03-15 16:44:41,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 2.2713647120694187) internal successors, (8638), 3803 states have internal predecessors, (8638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:41,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 8638 transitions. [2022-03-15 16:44:41,938 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 8638 transitions. Word has length 32 [2022-03-15 16:44:41,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:41,938 INFO L470 AbstractCegarLoop]: Abstraction has 3804 states and 8638 transitions. [2022-03-15 16:44:41,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:41,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 8638 transitions. [2022-03-15 16:44:41,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:41,942 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:41,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:41,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:42,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:42,158 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:42,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:42,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1453373471, now seen corresponding path program 43 times [2022-03-15 16:44:42,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:42,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408713466] [2022-03-15 16:44:42,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:42,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:42,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:42,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408713466] [2022-03-15 16:44:42,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408713466] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:42,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154081338] [2022-03-15 16:44:42,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:44:42,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:42,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:42,313 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:42,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 16:44:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:42,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:44:42,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:42,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:42,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:44:42,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:42,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:42,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:44:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:42,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:42,768 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:42,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:44:42,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:42,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154081338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:42,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:42,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-03-15 16:44:42,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869946987] [2022-03-15 16:44:42,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:42,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:44:42,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:42,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:44:42,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:44:42,913 INFO L87 Difference]: Start difference. First operand 3804 states and 8638 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:43,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:43,214 INFO L93 Difference]: Finished difference Result 4154 states and 9383 transitions. [2022-03-15 16:44:43,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:44:43,215 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:43,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:43,220 INFO L225 Difference]: With dead ends: 4154 [2022-03-15 16:44:43,220 INFO L226 Difference]: Without dead ends: 4143 [2022-03-15 16:44:43,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=312, Invalid=1580, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:44:43,222 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 147 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:43,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 182 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 228 Invalid, 0 Unknown, 314 Unchecked, 0.1s Time] [2022-03-15 16:44:43,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2022-03-15 16:44:43,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 3797. [2022-03-15 16:44:43,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3797 states, 3796 states have (on average 2.2710748155953637) internal successors, (8621), 3796 states have internal predecessors, (8621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:43,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 8621 transitions. [2022-03-15 16:44:43,306 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 8621 transitions. Word has length 32 [2022-03-15 16:44:43,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:43,306 INFO L470 AbstractCegarLoop]: Abstraction has 3797 states and 8621 transitions. [2022-03-15 16:44:43,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:43,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 8621 transitions. [2022-03-15 16:44:43,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:43,311 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:43,311 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:43,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:43,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-15 16:44:43,527 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:43,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:43,528 INFO L85 PathProgramCache]: Analyzing trace with hash -62131981, now seen corresponding path program 44 times [2022-03-15 16:44:43,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:43,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619224400] [2022-03-15 16:44:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:43,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:43,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:43,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619224400] [2022-03-15 16:44:43,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619224400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:43,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113378409] [2022-03-15 16:44:43,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:44:43,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:43,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:43,744 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:43,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 16:44:43,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:44:43,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:43,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:44:43,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:44,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:44,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:44:44,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:44,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:44,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:44:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:44,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:44,402 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:44,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:44:44,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:44,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113378409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:44,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:44,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-03-15 16:44:44,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720108393] [2022-03-15 16:44:44,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:44,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:44:44,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:44,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:44:44,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:44:44,611 INFO L87 Difference]: Start difference. First operand 3797 states and 8621 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:45,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:45,340 INFO L93 Difference]: Finished difference Result 4560 states and 10241 transitions. [2022-03-15 16:44:45,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:44:45,340 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:45,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:45,345 INFO L225 Difference]: With dead ends: 4560 [2022-03-15 16:44:45,345 INFO L226 Difference]: Without dead ends: 4520 [2022-03-15 16:44:45,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=456, Invalid=2406, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:44:45,346 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 162 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 545 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:45,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 263 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 300 Invalid, 0 Unknown, 545 Unchecked, 0.1s Time] [2022-03-15 16:44:45,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4520 states. [2022-03-15 16:44:45,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 3870. [2022-03-15 16:44:45,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 2.271387955544068) internal successors, (8788), 3869 states have internal predecessors, (8788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:45,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 8788 transitions. [2022-03-15 16:44:45,387 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 8788 transitions. Word has length 32 [2022-03-15 16:44:45,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:45,387 INFO L470 AbstractCegarLoop]: Abstraction has 3870 states and 8788 transitions. [2022-03-15 16:44:45,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:45,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 8788 transitions. [2022-03-15 16:44:45,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:45,392 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:45,392 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:45,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:45,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-15 16:44:45,604 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:45,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:45,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1842733581, now seen corresponding path program 45 times [2022-03-15 16:44:45,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:45,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567434646] [2022-03-15 16:44:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:45,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:45,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:45,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567434646] [2022-03-15 16:44:45,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567434646] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:45,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685013555] [2022-03-15 16:44:45,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:44:45,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:45,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:45,793 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:45,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 16:44:45,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:44:45,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:45,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:44:45,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:46,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:46,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:44:46,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:46,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:46,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:46,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:44:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:46,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:46,420 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:46,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:44:46,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:46,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685013555] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:46,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:46,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-03-15 16:44:46,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034920722] [2022-03-15 16:44:46,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:46,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:44:46,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:46,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:44:46,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:44:46,678 INFO L87 Difference]: Start difference. First operand 3870 states and 8788 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:47,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:47,198 INFO L93 Difference]: Finished difference Result 5581 states and 12529 transitions. [2022-03-15 16:44:47,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:44:47,199 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:47,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:47,206 INFO L225 Difference]: With dead ends: 5581 [2022-03-15 16:44:47,206 INFO L226 Difference]: Without dead ends: 5455 [2022-03-15 16:44:47,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=328, Invalid=1652, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:44:47,207 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 204 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:47,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 286 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 402 Invalid, 0 Unknown, 446 Unchecked, 0.2s Time] [2022-03-15 16:44:47,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5455 states. [2022-03-15 16:44:47,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5455 to 3920. [2022-03-15 16:44:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 2.2702219954069918) internal successors, (8897), 3919 states have internal predecessors, (8897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 8897 transitions. [2022-03-15 16:44:47,264 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 8897 transitions. Word has length 32 [2022-03-15 16:44:47,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:47,264 INFO L470 AbstractCegarLoop]: Abstraction has 3920 states and 8897 transitions. [2022-03-15 16:44:47,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:47,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 8897 transitions. [2022-03-15 16:44:47,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:47,268 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:47,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:47,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-15 16:44:47,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-15 16:44:47,483 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:47,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:47,484 INFO L85 PathProgramCache]: Analyzing trace with hash 778274133, now seen corresponding path program 46 times [2022-03-15 16:44:47,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:47,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892207818] [2022-03-15 16:44:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:47,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:47,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:47,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892207818] [2022-03-15 16:44:47,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892207818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:47,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158891316] [2022-03-15 16:44:47,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:44:47,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:47,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:47,668 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:47,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 16:44:47,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:44:47,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:47,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:44:47,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:47,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:47,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:44:47,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:47,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:47,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:44:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:47,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:48,173 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:48,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:44:48,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:48,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158891316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:48,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:48,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-03-15 16:44:48,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145035679] [2022-03-15 16:44:48,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:48,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:44:48,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:48,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:44:48,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:44:48,368 INFO L87 Difference]: Start difference. First operand 3920 states and 8897 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:49,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:49,012 INFO L93 Difference]: Finished difference Result 5422 states and 12182 transitions. [2022-03-15 16:44:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:44:49,012 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:49,019 INFO L225 Difference]: With dead ends: 5422 [2022-03-15 16:44:49,019 INFO L226 Difference]: Without dead ends: 5349 [2022-03-15 16:44:49,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 48 SyntacticMatches, 13 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=384, Invalid=1968, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:44:49,047 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 144 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:49,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 248 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 442 Invalid, 0 Unknown, 417 Unchecked, 0.1s Time] [2022-03-15 16:44:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2022-03-15 16:44:49,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4155. [2022-03-15 16:44:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4155 states, 4154 states have (on average 2.2708233028406357) internal successors, (9433), 4154 states have internal predecessors, (9433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4155 states to 4155 states and 9433 transitions. [2022-03-15 16:44:49,114 INFO L78 Accepts]: Start accepts. Automaton has 4155 states and 9433 transitions. Word has length 32 [2022-03-15 16:44:49,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:49,114 INFO L470 AbstractCegarLoop]: Abstraction has 4155 states and 9433 transitions. [2022-03-15 16:44:49,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:49,114 INFO L276 IsEmpty]: Start isEmpty. Operand 4155 states and 9433 transitions. [2022-03-15 16:44:49,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:49,118 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:49,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:49,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:49,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:49,331 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:49,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:49,332 INFO L85 PathProgramCache]: Analyzing trace with hash 388256609, now seen corresponding path program 47 times [2022-03-15 16:44:49,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:49,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934577136] [2022-03-15 16:44:49,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:49,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:49,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:49,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934577136] [2022-03-15 16:44:49,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934577136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:49,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215435134] [2022-03-15 16:44:49,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:44:49,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:49,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:49,520 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:49,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 16:44:49,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:44:49,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:49,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:44:49,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:49,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:49,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-15 16:44:49,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:49,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:49,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:49,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:44:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:49,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:49,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:49,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:49,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:49,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 57 [2022-03-15 16:44:50,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-03-15 16:44:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:50,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215435134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:50,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:50,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-03-15 16:44:50,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226860508] [2022-03-15 16:44:50,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:50,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:44:50,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:50,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:44:50,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:44:50,210 INFO L87 Difference]: Start difference. First operand 4155 states and 9433 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:50,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:50,685 INFO L93 Difference]: Finished difference Result 5217 states and 11757 transitions. [2022-03-15 16:44:50,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:44:50,685 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:50,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:50,692 INFO L225 Difference]: With dead ends: 5217 [2022-03-15 16:44:50,692 INFO L226 Difference]: Without dead ends: 5195 [2022-03-15 16:44:50,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=475, Invalid=2281, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:44:50,693 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 119 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 504 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:50,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 223 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 406 Invalid, 0 Unknown, 504 Unchecked, 0.1s Time] [2022-03-15 16:44:50,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5195 states. [2022-03-15 16:44:50,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5195 to 4255. [2022-03-15 16:44:50,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4255 states, 4254 states have (on average 2.2717442407146216) internal successors, (9664), 4254 states have internal predecessors, (9664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4255 states to 4255 states and 9664 transitions. [2022-03-15 16:44:50,767 INFO L78 Accepts]: Start accepts. Automaton has 4255 states and 9664 transitions. Word has length 32 [2022-03-15 16:44:50,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:50,767 INFO L470 AbstractCegarLoop]: Abstraction has 4255 states and 9664 transitions. [2022-03-15 16:44:50,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:50,767 INFO L276 IsEmpty]: Start isEmpty. Operand 4255 states and 9664 transitions. [2022-03-15 16:44:50,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:50,771 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:50,772 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:50,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:50,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-15 16:44:50,987 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:50,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:50,988 INFO L85 PathProgramCache]: Analyzing trace with hash 36126075, now seen corresponding path program 48 times [2022-03-15 16:44:50,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:50,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101483199] [2022-03-15 16:44:50,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:50,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:51,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:51,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101483199] [2022-03-15 16:44:51,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101483199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:51,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631187954] [2022-03-15 16:44:51,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:44:51,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:51,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:51,122 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:51,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 16:44:51,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:44:51,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:51,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:44:51,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:51,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:51,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:44:51,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:51,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:51,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:44:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:51,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:51,744 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:51,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:44:51,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:51,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631187954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:51,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:51,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-03-15 16:44:51,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655497642] [2022-03-15 16:44:51,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:51,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:44:51,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:51,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:44:51,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:44:51,889 INFO L87 Difference]: Start difference. First operand 4255 states and 9664 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:52,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:52,613 INFO L93 Difference]: Finished difference Result 6892 states and 15481 transitions. [2022-03-15 16:44:52,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:44:52,613 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:52,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:52,623 INFO L225 Difference]: With dead ends: 6892 [2022-03-15 16:44:52,623 INFO L226 Difference]: Without dead ends: 6717 [2022-03-15 16:44:52,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 52 SyntacticMatches, 14 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=2156, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:44:52,624 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 190 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 526 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:52,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 286 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 336 Invalid, 0 Unknown, 526 Unchecked, 0.1s Time] [2022-03-15 16:44:52,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6717 states. [2022-03-15 16:44:52,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6717 to 4460. [2022-03-15 16:44:52,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 4459 states have (on average 2.270015698587127) internal successors, (10122), 4459 states have internal predecessors, (10122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:52,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 10122 transitions. [2022-03-15 16:44:52,689 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 10122 transitions. Word has length 32 [2022-03-15 16:44:52,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:52,689 INFO L470 AbstractCegarLoop]: Abstraction has 4460 states and 10122 transitions. [2022-03-15 16:44:52,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:52,690 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 10122 transitions. [2022-03-15 16:44:52,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:52,694 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:52,694 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:52,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:52,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 16:44:52,908 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:52,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:52,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1637833507, now seen corresponding path program 49 times [2022-03-15 16:44:52,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:52,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913499352] [2022-03-15 16:44:52,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:52,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:53,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:53,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913499352] [2022-03-15 16:44:53,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913499352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:53,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168681039] [2022-03-15 16:44:53,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:44:53,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:53,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:53,063 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:53,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 16:44:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:53,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:44:53,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:53,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:53,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:44:53,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:53,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:53,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:53,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:44:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:53,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:53,605 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:53,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:44:53,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:53,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168681039] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:53,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:53,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-03-15 16:44:53,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831341438] [2022-03-15 16:44:53,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:53,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:44:53,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:53,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:44:53,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:44:53,706 INFO L87 Difference]: Start difference. First operand 4460 states and 10122 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:54,259 INFO L93 Difference]: Finished difference Result 6917 states and 15565 transitions. [2022-03-15 16:44:54,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:44:54,260 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:54,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:54,269 INFO L225 Difference]: With dead ends: 6917 [2022-03-15 16:44:54,269 INFO L226 Difference]: Without dead ends: 6736 [2022-03-15 16:44:54,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=421, Invalid=1741, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:44:54,270 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 142 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 515 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:54,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 329 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 688 Invalid, 0 Unknown, 515 Unchecked, 0.2s Time] [2022-03-15 16:44:54,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6736 states. [2022-03-15 16:44:54,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6736 to 4336. [2022-03-15 16:44:54,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4336 states, 4335 states have (on average 2.2622837370242213) internal successors, (9807), 4335 states have internal predecessors, (9807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:54,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4336 states to 4336 states and 9807 transitions. [2022-03-15 16:44:54,334 INFO L78 Accepts]: Start accepts. Automaton has 4336 states and 9807 transitions. Word has length 32 [2022-03-15 16:44:54,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:54,334 INFO L470 AbstractCegarLoop]: Abstraction has 4336 states and 9807 transitions. [2022-03-15 16:44:54,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:54,335 INFO L276 IsEmpty]: Start isEmpty. Operand 4336 states and 9807 transitions. [2022-03-15 16:44:54,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:54,340 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:54,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:54,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:54,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:54,555 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:54,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:54,556 INFO L85 PathProgramCache]: Analyzing trace with hash -233872393, now seen corresponding path program 50 times [2022-03-15 16:44:54,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:54,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658870367] [2022-03-15 16:44:54,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:54,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:54,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:54,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658870367] [2022-03-15 16:44:54,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658870367] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:54,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760632534] [2022-03-15 16:44:54,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:44:54,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:54,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:54,768 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:54,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 16:44:54,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:44:54,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:54,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:44:54,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:55,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:55,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:44:55,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:55,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:55,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:55,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 16:44:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:55,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:55,261 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:44:55,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:44:55,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:44:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:55,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760632534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:55,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:55,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-03-15 16:44:55,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493200965] [2022-03-15 16:44:55,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:55,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:44:55,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:55,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:44:55,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:44:55,384 INFO L87 Difference]: Start difference. First operand 4336 states and 9807 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:56,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:56,073 INFO L93 Difference]: Finished difference Result 6011 states and 13443 transitions. [2022-03-15 16:44:56,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:44:56,074 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:44:56,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:56,082 INFO L225 Difference]: With dead ends: 6011 [2022-03-15 16:44:56,082 INFO L226 Difference]: Without dead ends: 5882 [2022-03-15 16:44:56,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=402, Invalid=1760, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:44:56,082 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 154 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 803 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:56,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 348 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 510 Invalid, 0 Unknown, 803 Unchecked, 0.2s Time] [2022-03-15 16:44:56,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5882 states. [2022-03-15 16:44:56,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5882 to 4195. [2022-03-15 16:44:56,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4195 states, 4194 states have (on average 2.259656652360515) internal successors, (9477), 4194 states have internal predecessors, (9477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:56,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 9477 transitions. [2022-03-15 16:44:56,139 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 9477 transitions. Word has length 32 [2022-03-15 16:44:56,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:56,139 INFO L470 AbstractCegarLoop]: Abstraction has 4195 states and 9477 transitions. [2022-03-15 16:44:56,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:56,139 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 9477 transitions. [2022-03-15 16:44:56,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:44:56,144 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:56,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:56,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:56,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-15 16:44:56,360 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:44:56,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:56,360 INFO L85 PathProgramCache]: Analyzing trace with hash -13819161, now seen corresponding path program 51 times [2022-03-15 16:44:56,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:56,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697787940] [2022-03-15 16:44:56,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:56,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:44:56,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:56,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697787940] [2022-03-15 16:44:56,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697787940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:56,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22031246] [2022-03-15 16:44:56,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:44:56,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:56,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:56,546 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:56,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 16:44:56,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:44:56,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:56,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:44:56,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:56,837 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:56,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-15 16:44:56,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:56,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2022-03-15 16:44:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:57,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-03-15 16:57:57,543 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:57:57,543 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:57:57,547 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 16:57:57,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:57,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:57,763 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. [2022-03-15 16:57:57,765 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 16:57:57,765 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 16:57:57,771 INFO L732 BasicCegarLoop]: Path program histogram: [51, 1, 1] [2022-03-15 16:57:57,777 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 16:57:57,777 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 16:57:57,791 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 04:57:57 BasicIcfg [2022-03-15 16:57:57,791 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 16:57:57,792 INFO L158 Benchmark]: Toolchain (without parser) took 868822.15ms. Allocated memory was 211.8MB in the beginning and 596.6MB in the end (delta: 384.8MB). Free memory was 169.1MB in the beginning and 370.5MB in the end (delta: -201.4MB). Peak memory consumption was 363.9MB. Max. memory is 8.0GB. [2022-03-15 16:57:57,792 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 211.8MB. Free memory is still 170.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:57:57,792 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.84ms. Allocated memory is still 211.8MB. Free memory was 169.1MB in the beginning and 167.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:57:57,792 INFO L158 Benchmark]: Boogie Preprocessor took 13.29ms. Allocated memory is still 211.8MB. Free memory was 167.5MB in the beginning and 166.5MB in the end (delta: 946.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:57:57,792 INFO L158 Benchmark]: RCFGBuilder took 220.97ms. Allocated memory is still 211.8MB. Free memory was 166.5MB in the beginning and 157.0MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-15 16:57:57,792 INFO L158 Benchmark]: TraceAbstraction took 868567.68ms. Allocated memory was 211.8MB in the beginning and 596.6MB in the end (delta: 384.8MB). Free memory was 156.5MB in the beginning and 370.5MB in the end (delta: -214.0MB). Peak memory consumption was 351.3MB. Max. memory is 8.0GB. [2022-03-15 16:57:57,792 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10ms. Allocated memory is still 211.8MB. Free memory is still 170.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 16.84ms. Allocated memory is still 211.8MB. Free memory was 169.1MB in the beginning and 167.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.29ms. Allocated memory is still 211.8MB. Free memory was 167.5MB in the beginning and 166.5MB in the end (delta: 946.4kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 220.97ms. Allocated memory is still 211.8MB. Free memory was 166.5MB in the beginning and 157.0MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 868567.68ms. Allocated memory was 211.8MB in the beginning and 596.6MB in the end (delta: 384.8MB). Free memory was 156.5MB in the beginning and 370.5MB in the end (delta: -214.0MB). Peak memory consumption was 351.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 868.5s, OverallIterations: 53, TraceHistogramMax: 2, PathProgramHistogramMax: 51, EmptinessCheckTime: 0.2s, AutomataDifference: 25.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7585 SdHoareTripleChecker+Valid, 6.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7585 mSDsluCounter, 11898 SdHoareTripleChecker+Invalid, 5.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 19136 IncrementalHoareTripleChecker+Unchecked, 16771 mSDsCounter, 1584 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17660 IncrementalHoareTripleChecker+Invalid, 38380 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1584 mSolverCounterUnsat, 1312 mSDtfsCounter, 17660 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4938 GetRequests, 2515 SyntacticMatches, 221 SemanticMatches, 2202 ConstructedPredicates, 0 IntricatePredicates, 12 DeprecatedPredicates, 40328 ImplicationChecksByTransitivity, 32.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4460occurred in iteration=50, InterpolantAutomatonStates: 1537, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 52 MinimizatonAttempts, 26546 StatesRemovedByMinimization, 51 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 47.2s InterpolantComputationTime, 3204 NumberOfCodeBlocks, 3204 NumberOfCodeBlocksAsserted, 159 NumberOfCheckSat, 4638 ConstructedInterpolants, 832 QuantifiedInterpolants, 56221 SizeOfPredicates, 862 NumberOfNonLiveVariables, 3371 ConjunctsInSsa, 1089 ConjunctsInUnsatCore, 152 InterpolantComputations, 2 PerfectInterpolantSequences, 79/1900 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown